{"id":4518,"date":"2026-06-30T12:11:15","date_gmt":"2026-06-30T03:11:15","guid":{"rendered":"https:\/\/smilesoftware.org\/?p=4518"},"modified":"2026-06-30T12:11:16","modified_gmt":"2026-06-30T03:11:16","slug":"%e3%83%ac%e3%82%ac%e3%82%b7%e3%83%bc%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0%e3%81%a8%e3%81%af%ef%bc%9f%e8%aa%b2%e9%a1%8c%e3%83%bb%e3%83%aa%e3%82%b9%e3%82%af%e3%81%a8%e5%88%b7%e6%96%b0%e3%83%bb%e3%82%af","status":"publish","type":"post","link":"https:\/\/smilesoftware.org\/en\/%E3%83%AC%E3%82%AC%E3%82%B7%E3%83%BC%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%81%A8%E3%81%AF%E8%AA%B2%E9%A1%8C%E3%83%AA%E3%82%B9%E3%82%AF%E3%81%A8%E5%88%B7%E6%96%B0%E3%82%AF\/","title":{"rendered":"What is legacy system? Clear guide to issues, risks, renewal, and cloud migration [2026 Edition]"},"content":{"rendered":"<style>.smile-post-content{max-width:920px;margin-left:auto;margin-right:auto;}\n.smile-post-content .smile-article-header{padding:28px 0 24px;border-bottom:1px solid #d7e8f7;}\n.smile-post-content .smile-category-pill{display:inline-flex;align-items:center;min-height:30px;padding:0 12px;border-radius:999px;background:#eaf7ff;color:#155e95;font-size:12px;font-weight:800;}\n.smile-post-content .smile-date{margin-left:10px;font-size:13px;color:#64748b;}\n.smile-post-content .smile-article-title{font-size:36px;line-height:1.25;margin:18px 0 12px;font-weight:800;color:#101820;letter-spacing:0;}\n.smile-post-content .smile-excerpt{font-size:17px;line-height:1.8;color:#475569;margin:0;}\n.smile-post-content .smile-intro-box,.smile-post-content .smile-toc,.smile-post-content .smile-article-cta{border-radius:8px;}\n.smile-post-content .smile-intro-box{margin:28px 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.smile-service-process__chevron{display:none}.smile-post-content .smile-section__number{font-size:56px}}<\/style>\n\n\n<div class=\"smile-post-content\">\n\n\n<header class=\"smile-article-header\"><div><span class=\"smile-category-pill\">Blog<\/span><span class=\"smile-date\">2026.06.17<\/span><\/div><h1 class=\"smile-article-title\">What is legacy system? Clear guide to issues, risks, renewal, and cloud migration [2026 Edition]<\/h1><p class=\"smile-excerpt\">This issue was highlighted in the Ministry of Economy, Trade and Industry\u2019s \u201cDX Report,\u201d which warns that if companies leave their legacy systems unaddressed, Japan could face annual economic losses of up to 12 trillion yen from 2025 onward, leading to weaker international competitiveness.<\/p><\/header>\n\n\n<section class=\"smile-intro-box\"><div class=\"smile-lead-definition\"><div class=\"smile-lead-definition__mark\">Legacy<\/div><div class=\"smile-lead-definition__label\">Definition<\/div><p>In Japanese business settings, a \u201clegacy system\u201d is not a problem simply because it is old. It refers to a system that can no longer keep up with change and has become a drag on the business. Here, we clarify the correct understanding of the term.<\/p><\/div><\/section>\n\n\n<nav class=\"smile-toc\" aria-label=\"Table of Contents\"><h2 class=\"smile-toc__title\">Table of Contents<\/h2><div class=\"smile-toc__grid\"><a class=\"smile-toc__item\" href=\"#section-1\"><b class=\"smile-toc__number\">01<\/b><span class=\"smile-toc__label\">What is legacy system?<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-2\"><b class=\"smile-toc__number\">02<\/b><span class=\"smile-toc__label\">Why do legacy systems become a problem?<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-3\"><b class=\"smile-toc__number\">03<\/b><span class=\"smile-toc__label\">Causes of legacy systems<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-4\"><b class=\"smile-toc__number\">04<\/b><span class=\"smile-toc__label\">Is your system legacy? Checkpoints and self-assessment<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-5\"><b class=\"smile-toc__number\">05<\/b><span class=\"smile-toc__label\">How to move away from legacy systems and build modernization strategy<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-6\"><b class=\"smile-toc__number\">06<\/b><span class=\"smile-toc__label\">Key points for successful legacy system renewal<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-7\"><b class=\"smile-toc__number\">07<\/b><span class=\"smile-toc__label\">Legacy system modernization support by SMILE<\/span><\/a><a class=\"smile-toc__item\" href=\"#section-8\"><b class=\"smile-toc__number\">08<\/b><span class=\"smile-toc__label\">Summary<\/span><\/a><\/div><\/nav>\n\n\n<section class=\"smile-section\" id=\"section-1\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">01<\/div><h2 class=\"smile-section__title\">What is legacy system?<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4510\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-01-legacy-definition-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>Source: Ministry of Economy, Trade and Industry, \u201cDX Report: Overcoming the \u20182025 Digital Cliff\u2019 of IT Systems and Full-Scale Deployment of DX (Summary)\u201d<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Definition and characteristics of legacy systems<\/h3>\n\n\n<p>A legacy system is an information system built on outdated technologies, architectures, processes, or operating models that has become difficult to maintain, modify, or integrate with other systems. These systems are often based on mainframes or office computers from the 1980s and are widely known as part of the \u201c2025 Digital Cliff\u201d issue because rising maintenance and operating costs can hinder DX initiatives. As a result, legacy system renewal, or modernization, has become an important management priority for many companies. What matters is not the age of the system itself, but whether it limits business agility or competitiveness.<\/p>\n\n\n<p>Typical characteristics of legacy systems: features and definition<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Outdated programming languages and frameworks (COBOL, VB6, older Java, proprietary FW)<\/li><li>Hardware, OS, and middleware with ended vendor support (EoL)<\/li><li>Insufficient documentation and knowledge silos (limited personnel, dependence on tacit knowledge)<\/li><li>API integration with external systems and SaaS is difficult<\/li><li>Even minor changes have unclear impact, driving up testing workload and cost<\/li><li>Security patches cannot be applied, delaying vulnerability remediation<\/li><li>No Support for Modern Browsers, Devices, or Cloud Environments<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Common examples of legacy systems<\/h3>\n\n\n<p>In real-world business settings, systems like following often apply. Examples by area<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Core systems (business systems such as sales, inventory, and accounting)<\/li><li>Batch and online processing on mainframes<\/li><li>Internal web systems built on proprietary frameworks<\/li><\/ul>\n\n\n<p>Common warning signs<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>\"Only one person can make system changes\"<\/li><li>\"It does not run on the latest browsers, so the company uses IE compatibility mode\"<\/li><li>\"Changing wording on reports takes weeks to months\"<\/li><li>\"Every data integration requires custom batch processing or manual work\"<\/li><\/ul>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-2\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">02<\/div><h2 class=\"smile-section__title\">Why do legacy systems become a problem?<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4511\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-02-legacy-risks-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>\"It still works, so it is fine\" can become the most costly assumption. Here is what can happen across business, IT, and security.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Business risks (lost opportunities and reduced competitiveness)<\/h3>\n\n\n<p>If services and channels cannot be expanded quickly in response to market changes, lost opportunities will continue to accumulate.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Blocks DX: API integration difficult; connection to SaaS or external data impossible<\/li><li>Lack of Support for New Models: Delays in Launching Subscriptions, D2C, and Online Ordering<\/li><li>Barriers to data utilization: lack of real-time analytics and company-wide data integration delays decision-making<\/li><li>As result, companies miss virtuous cycle of better customer experience, higher operational efficiency, and sales growth<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Higher workload and costs for IT department<\/h3>\n\n\n<p>Teams become stuck in reactive operations, leaving no room for proactive IT investment.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Aging maintenance staff and retirement risk make handover difficult and create black boxes<\/li><li>Impact is hard to assess, making large-scale testing necessary even for minor changes<\/li><li>Operating and maintenance costs rise year after year, while new feature development stalls (rising TCO)<\/li><li>Mini case: maintenance costs increase every year, yet users say \u201cnothing has changed\u201d<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Security and compliance risks<\/h3>\n\n\n<p>Single major incident can cause losses exceeding savings.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Vulnerabilities Cannot Be Addressed Because OS or Middleware Is No Longer Supported<\/li><li>Incomplete logs and inadequate encryption hinder investigation and reporting when incidents occur<\/li><li>Difficult to comply with regulations in finance, healthcare, personal information protection, and other areas<\/li><\/ul>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-3\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">03<\/div><h2 class=\"smile-section__title\">Causes of legacy systems<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4512\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-03-legacy-causes-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>First step is not assigning blame, but understanding why issue occurs within system. This also serves as persuasive evidence.<\/p><div class=\"smile-evidence-panels\"><article class=\"smile-evidence-panel\"><div class=\"smile-evidence-panel__mark\"><span class=\"smile-evidence-panel__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--operations\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><circle cx=\"32\" cy=\"32\" r=\"9\"\/><path d=\"M32 8v8\"\/><path d=\"M32 48v8\"\/><path d=\"m15 15 6 6\"\/><path d=\"m43 43 6 6\"\/><path d=\"M8 32h8\"\/><path d=\"M48 32h8\"\/><path d=\"m15 49 6-6\"\/><path d=\"m43 21 6-6\"\/><\/svg><\/span><\/div><div class=\"smile-evidence-panel__body\"><h3 class=\"smile-evidence-panel__title\">Years of customization and ad hoc modifications<\/h3><p>The more short-term demands are met, the more system structure becomes distorted.<\/p><ul class=\"smile-bullet-list\"><li>Each additional request is handled case by case, creating patchwork system<\/li><li>Ad hoc fixes break consistency, and no one understands the overall design.<\/li><li>Unclear impact of changes in one area discourages system modifications<\/li><\/ul><\/div><\/article><article class=\"smile-evidence-panel\"><div class=\"smile-evidence-panel__mark\"><span class=\"smile-evidence-panel__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--policy\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><path d=\"M18 8h20l10 10v38H18z\"\/><path d=\"M38 8v12h10\"\/><path d=\"M24 32h18\"\/><path d=\"M24 42h14\"\/><path d=\"m24 22 4 4 8-8\"\/><\/svg><\/span><\/div><div class=\"smile-evidence-panel__body\"><h3 class=\"smile-evidence-panel__title\">Shortage of technical talent, knowledge silos, and lack of documentation<\/h3><p>Black boxes emerge in both people and paper-based processes.<\/p><ul class=\"smile-bullet-list\"><li>Personnel lock-in and insufficient training create \u201conly that person understands it\u201d situations<\/li><li>Incomplete and outdated documentation disrupts knowledge transfer<\/li><li>Prolonged vendor dependence \u2192 know-how loss due to contract or organizational changes<\/li><\/ul><\/div><\/article><article class=\"smile-evidence-panel\"><div class=\"smile-evidence-panel__mark\"><span class=\"smile-evidence-panel__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--market\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><path d=\"M10 50h44\"\/><path d=\"M16 42 28 30l8 8 16-20\"\/><path d=\"M40 18h12v12\"\/><\/svg><\/span><\/div><div class=\"smile-evidence-panel__body\"><h3 class=\"smile-evidence-panel__title\">Deferred Investment Decisions and a \u201cUse It Until It Breaks\u201d Culture<\/h3><p>Short-term optimization amplifies long-term risk.<\/p><ul class=\"smile-bullet-list\"><li>Modernization postponed because \u201cit still works\u201d or \u201cother projects take priority\u201d<\/li><li>Unclear ROI and concerns over failed renewal risk stall decision-making<\/li><li>As result, technical debt grows like snowball<\/li><\/ul><\/div><\/article><\/div>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-4\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">04<\/div><h2 class=\"smile-section__title\">Is your system legacy? Checkpoints and self-assessment<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4513\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-04-self-diagnosis-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>Make decisions based on facts, not intuition. Use the following checklist to screen your current situation.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Technology and architecture checklist<\/h3>\n\n\n<p>If three or more of the following apply, your system is likely becoming increasingly legacy.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Whether OS and middleware in use remain supported<\/li><li>Ease of hiring and developing talent for key languages and frameworks<\/li><li>Whether System Architecture Diagrams and Design Documents Are Up to Date<\/li><li>Whether automated testing (unit\/E2E) and CI\/CD are in place<\/li><li>Whether external integration via API possible (not dependent on batch processing or manual work)<\/li><li>Whether Cloud Support Is in Place, Including Scalability and Availability Design<\/li><li>Whether Security Patches Are Being Applied in a Planned Manner<\/li><li>Whether auditing, logging, and encryption meet required standards<\/li><li>Whether Operational Standardization, Such as Containerization and Virtualization, Is Progressing<\/li><li>Whether functions are overcrowded in single monolith<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Operations and business checklist<\/h3>\n\n\n<p>Review also from perspective of operational burden and business impact.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Minor report changes take weeks to months<\/li><li>Business Operations Are Being Adapted to System Constraints<\/li><li>More Than Six Months to Add New Services or Channels<\/li><li>Change impact analysis and acceptance testing are consistently excessive<\/li><li>Security and audit response feels more burdensome than at other companies<\/li><li>Vendor quotes rise year after year, while cost-effectiveness remains unclear<\/li><\/ul>\n\n\n<p>Score Guide: 0\u20132 items = minor issues, 3\u20135 items = moderate issues, 6 or more items = major issues. If you feel more detailed diagnosis is needed, consider assessment by a specialist.<\/p>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-5\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">05<\/div><h2 class=\"smile-section__title\">How to move away from legacy systems and build modernization strategy<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4514\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-05-modernization-strategy-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>Goal: \u201cKeep Evolving Without Breaking or Stopping.\u201d Practical Answer: Phased Approach.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">How to avoid jumping straight into a full replacement<\/h3>\n\n\n<p>Big-bang approach carries high failure risk in timeline, cost, and user adoption. Phased modernization is more practical: analyze current state, build roadmap, start small by priority, and accumulate impact and learning.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-group-heading\">Common approaches to legacy system modernization<\/h3>\n<p>Legacy system modernization can be grouped into four main approaches, depending on objectives and constraints such as business impact, cost, and risk.<\/p><div class=\"smile-insight-cards smile-insight-cards--four\"><div class=\"smile-insight-card\"><div class=\"smile-insight-card__head\"><span class=\"smile-insight-card__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--policy\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><path d=\"M18 8h20l10 10v38H18z\"\/><path d=\"M38 8v12h10\"\/><path d=\"M24 32h18\"\/><path d=\"M24 42h14\"\/><path d=\"m24 22 4 4 8-8\"\/><\/svg><\/span><h3 class=\"smile-insight-card__title\">\u2460 Rebuild<\/h3><\/div><ul class=\"smile-bullet-list\"><li>This approach retires the existing system and rebuilds it from the requirements definition stage. It enables a fundamental review of business processes and architecture, offering the greatest future potential while also carrying higher risks in terms of cost, effort, and business impact.<\/li><\/ul><\/div><div class=\"smile-insight-card\"><div class=\"smile-insight-card__head\"><span class=\"smile-insight-card__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--operations\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><circle cx=\"32\" cy=\"32\" r=\"9\"\/><path d=\"M32 8v8\"\/><path d=\"M32 48v8\"\/><path d=\"m15 15 6 6\"\/><path d=\"m43 43 6 6\"\/><path d=\"M8 32h8\"\/><path d=\"M48 32h8\"\/><path d=\"m15 49 6-6\"\/><path d=\"m43 21 6-6\"\/><\/svg><\/span><h3 class=\"smile-insight-card__title\">\u2461 Rewrite<\/h3><\/div><ul class=\"smile-bullet-list\"><li>This approach rewrites source code using newer technologies while largely preserving existing business logic. Because it can eliminate technical debt while maintaining business specifications, it is a relatively common choice among Japanese companies.<\/li><\/ul><\/div><div class=\"smile-insight-card\"><div class=\"smile-insight-card__head\"><span class=\"smile-insight-card__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--market\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><path d=\"M10 50h44\"\/><path d=\"M16 42 28 30l8 8 16-20\"\/><path d=\"M40 18h12v12\"\/><\/svg><\/span><h3 class=\"smile-insight-card__title\">\u2462 Replatform<\/h3><\/div><ul class=\"smile-bullet-list\"><li>This method moves the runtime platform and middleware to a new environment without major changes to the application structure. A typical example is migration from on-premises to the cloud, delivering a degree of modernization while keeping cost and risk under control.<\/li><\/ul><\/div><div class=\"smile-insight-card\"><div class=\"smile-insight-card__head\"><span class=\"smile-insight-card__icon\" aria-hidden=\"true\"><svg class=\"smile-ui-icon smile-ui-icon--data\" viewbox=\"0 0 64 64\" aria-hidden=\"true\" focusable=\"false\" stroke=\"currentColor\"><path d=\"M12 18c0-5 9-9 20-9s20 4 20 9-9 9-20 9-20-4-20-9z\"\/><path d=\"M12 18v14c0 5 9 9 20 9s20-4 20-9V18\"\/><path d=\"M12 32v14c0 5 9 9 20 9s20-4 20-9V32\"\/><\/svg><\/span><h3 class=\"smile-insight-card__title\">\u2463 Rehost<\/h3><\/div><ul class=\"smile-bullet-list\"><li>This method migrates an application to another environment with little to no change. It is commonly known as Lift &amp; Shift and enables a short, low-risk migration, but its modernization impact is limited.<\/li><\/ul><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading smile-group-heading\">Steps for phased modernization<\/h3><p>Role allocation: business units define requirements and value hypotheses, IT oversees architecture and quality management, and partners drive design, implementation, and automation platforms.<\/p><div class=\"smile-step-roadmap\"><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">01<\/span><div><h4 class=\"smile-step-roadmap__title\">Current-state survey (assessment and inventory)<\/h4><p class=\"smile-step-roadmap__detail\">Visualization of Architecture, Code, Operations, and Costs<\/p><\/div><\/article><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">02<\/span><div><h4 class=\"smile-step-roadmap__title\">Visualization of risks and costs<\/h4><p class=\"smile-step-roadmap__detail\">Sort by priority: impact \u00d7 urgency \u00d7 ROI<\/p><\/div><\/article><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">03<\/span><div><h4 class=\"smile-step-roadmap__title\">Strategy and Roadmap Development<\/h4><p class=\"smile-step-roadmap__detail\">Select an Approach for Each System<\/p><\/div><\/article><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">04<\/span><div><h4 class=\"smile-step-roadmap__title\">Start with PoC\/small-scope areas<\/h4><p class=\"smile-step-roadmap__detail\">Establish success patterns and standards<\/p><\/div><\/article><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">05<\/span><div><h4 class=\"smile-step-roadmap__title\">Full-Scale Rollout and Parallel Operation<\/h4><p class=\"smile-step-roadmap__detail\">Detailed planning for phased migration and data migration<\/p><\/div><\/article><article class=\"smile-step-roadmap__item\"><span class=\"smile-step-roadmap__index\">06<\/span><div><h4 class=\"smile-step-roadmap__title\">Operations and improvement cycle<\/h4><p class=\"smile-step-roadmap__detail\">Set SLOs\/quality indicators and improve continuously<\/p><\/div><\/article><\/div>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-6\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">06<\/div><h2 class=\"smile-section__title\">Key points for successful legacy system renewal<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4515\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-06-success-points-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>Successful companies share a well-balanced approach across management and frontline teams, as well as internal and external resources. Focus on the points that work in practice.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Engage management and business departments<\/h3>\n\n\n<p>Treating it not as IT-only topic but as management issue is key.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Messaging focus: risk reduction (security and business continuity) \u00d7 growth opportunities (new services and data utilization)<\/li><li>Clear KPIs: development lead time -30%, operations workload -20%, incidents -50%, change frequency x2, and more<\/li><li>Facilitating decision-making: use PoC to visualize impact and phased investment to reduce uncertainty<\/li><\/ul>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Balance between in-house development and use of external partners<\/h3>\n\n\n<p>Keep core expertise and operations design in-house; use external partners for implementation, testing, and 24\/7 operations.<\/p>\n\n\n<ul class=\"smile-bullet-list\"><li>Benefits of Offshore\/Nearshore: Cost Optimization, Access to Large-Scale Resources, and Advanced Technology Support<\/li><li>Collaboration model example: establish requirements and quality management in Japan, with implementation and automation handled by overseas team<\/li><li>SMILE provides structure combining quality and speed through Japanese-speaking PM\/BrSEs and Vietnamese development teams.<\/li><\/ul>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-7\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">07<\/div><h2 class=\"smile-section__title\">Legacy system modernization support by SMILE<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support.png\" alt=\"\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea\u30b9\u30af\u3068\u5237\u65b0\u30fb\u30af\u30e9\u30a6\u30c9\u79fb\u884c\u306e\u9032\u3081\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u30102026\u5e74\u7248\u3011\" class=\"wp-image-4516\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-07-smile-support-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<p>\"Start small, validate, and expand in phases.\" SMILE combines DX support with offshore development to guide low-risk, high-efficiency modernization.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">SMILE strengths: combined DX support and offshore development<\/h3>\n\n\n<ul class=\"smile-bullet-list\"><li>Strengths: Japanese market expertise \u00d7 development capabilities based in Vietnam. End-to-end support from upstream design to development, testing, and operations<\/li><li>Team structure: Japanese-speaking PM\/BrSE plus specialist teams for cloud, Web, mobile, and AI<\/li><li>Value: Balance cost and quality; validate through PoC, then maximize ROI through full-scale rollout<\/li><\/ul>\n\n\n<p>Start small with a legacy assessment and PoC support to evaluate impact and risk.<\/p>\n\n\n<h3 class=\"wp-block-heading smile-subheading\">Legacy system assessment and roadmap development service<\/h3>\n\n\n<p>Assessment and proposal process<\/p><ul class=\"smile-bullet-list\"><li>To drive system modernization reliably and effectively, our company<\/li><li>We conduct assessments and reviews through a clear, step-by-step process.<\/li><li>This enables us to manage risk properly while proposing the best approach for your business goals.<\/li><\/ul><div class=\"smile-service-process\"><article class=\"smile-service-process__item\"><div class=\"smile-service-process__head\"><span class=\"smile-service-process__step\">Step 1<\/span><h4 class=\"smile-service-process__title\">Current-state assessment (interviews)<\/h4><\/div><span class=\"smile-service-process__chevron\" aria-hidden=\"true\"><\/span><div class=\"smile-service-process__body\"><strong class=\"smile-service-process__purpose\">Objective: accurately understand overall picture of business operations and existing systems<\/strong><ul class=\"smile-bullet-list\"><li>Clarifying Core Business Functions, Workflows, and Dependencies<\/li><li>Review of Existing System Architecture and Inter-System Integrations<\/li><li>Understand operations and maintenance structure and release process<\/li><li>Interviews on current issues and improvement needs<\/li><\/ul><\/div><\/article><article class=\"smile-service-process__item\"><div class=\"smile-service-process__head\"><span class=\"smile-service-process__step\">Step 2<\/span><h4 class=\"smile-service-process__title\">Technical Assessment<\/h4><\/div><span class=\"smile-service-process__chevron\" aria-hidden=\"true\"><\/span><div class=\"smile-service-process__body\"><ul class=\"smile-bullet-list\"><li>Based on interview findings, we conduct detailed evaluation from technical perspective.<\/li><li>Architecture and scalability of current system<\/li><li>Source code status<\/li><li>(Programming Languages Used, Complexity, Maintainability)<\/li><li>Infrastructure and Runtime Environment<\/li><li>(On-Premises \/ Cloud)<\/li><li>Technical constraints, licenses, and relationships with related systems<\/li><\/ul><\/div><\/article><article class=\"smile-service-process__item\"><div class=\"smile-service-process__head\"><span class=\"smile-service-process__step\">Step 3<\/span><h4 class=\"smile-service-process__title\">Risk and issue analysis<\/h4><\/div><span class=\"smile-service-process__chevron\" aria-hidden=\"true\"><\/span><div class=\"smile-service-process__body\"><ul class=\"smile-bullet-list\"><li>We identify potential risks and issues from an independent, neutral perspective.<\/li><li>Technical risks from legacy technologies and dependence on specific individuals<\/li><li>Operational and security risks<\/li><li>Constraints Related to Cost, Performance, and Scalability<\/li><li>Organized by impact and response priority<\/li><\/ul><\/div><\/article><article class=\"smile-service-process__item\"><div class=\"smile-service-process__head\"><span class=\"smile-service-process__step\">Step 4<\/span><h4 class=\"smile-service-process__title\">Proposed Strategy and Roadmap<\/h4><\/div><span class=\"smile-service-process__chevron\" aria-hidden=\"true\"><\/span><div class=\"smile-service-process__body\"><ul class=\"smile-bullet-list\"><li>Based on analysis results, we propose optimal modernization strategy.<\/li><li>Selecting an Approach<\/li><li>(Migration \/ Improvement \/ Rebuild)<\/li><li>Define implementation scope and sequence for each phase<\/li><li>Prioritization Based on Investment Impact<\/li><li>Presentation of Estimated Cost and Timeline<\/li><\/ul><\/div><\/article><\/div>\n\n\n<h3 class=\"wp-block-heading smile-group-heading\">Deliverables<\/h3><div class=\"smile-deliverables\"><article class=\"smile-deliverable\"><h4 class=\"smile-deliverable__title\">System Assessment Report<\/h4><p class=\"smile-deliverable__body\">Organize and visualize current state, key issues, and risks<\/p><\/article><article class=\"smile-deliverable\"><h4 class=\"smile-deliverable__title\">Modernization and migration roadmap<\/h4><p class=\"smile-deliverable__body\">Proposed implementation phases and schedule<\/p><\/article><article class=\"smile-deliverable\"><h4 class=\"smile-deliverable__title\">Standard Guidelines<\/h4><p class=\"smile-deliverable__body\">Guidelines for Quality, Security, and Automation in Development and Operations<\/p><\/article><\/div>\n\n\n<\/section>\n\n\n<section class=\"smile-section\" id=\"section-8\"><div class=\"smile-section__head\"><div class=\"smile-section__number\">08<\/div><h2 class=\"smile-section__title\">Summary<\/h2><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary.png\" alt=\"8.\u307e\u3068\u3081\" class=\"wp-image-4517\" srcset=\"https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary.png 1536w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary-300x200.png 300w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary-1024x683.png 1024w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary-768x512.png 768w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary-18x12.png 18w, https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-section-08-summary-930x620.png 930w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n\n\n<div class=\"smile-summary-flow\"><article class=\"smile-summary-flow__item\"><span class=\"smile-summary-flow__index\">01<\/span><p class=\"smile-summary-flow__body\">Legacy systems are not safe simply because they still run; they are a management issue that carries hidden costs and risks. The fastest solution is to accurately understand legacy system issues, visualize the current state through legacy system assessment methods, and address them step by step.<\/p><\/article><article class=\"smile-summary-flow__item\"><span class=\"smile-summary-flow__index\">02<\/span><p class=\"smile-summary-flow__body\">Start by using an assessment method to inventory and prioritize systems. Then design legacy system modernization or cloud migration in phases based on the 7Rs, estimate the cost and ROI of legacy system renewal, and validate on a small scale.<\/p><\/article><article class=\"smile-summary-flow__item\"><span class=\"smile-summary-flow__index\">03<\/span><p class=\"smile-summary-flow__body\">Success depends on identifying impacted areas, reducing migration risk through the strangler pattern or parallel operation, strengthening security and audit readiness, and aligning on the roadmap and KPIs before moving forward.<\/p><\/article><article class=\"smile-summary-flow__item\"><span class=\"smile-summary-flow__index\">04<\/span><p class=\"smile-summary-flow__body\">If you are unsure where to start, use third-party assessment or PoC support to validate the next step with low risk.<\/p><\/article><\/div>\n\n\n<\/section>\n\n\n<section class=\"smile-article-cta\"><h2>Contact us about legacy system renewal<\/h2><p>If you need to clarify current-state diagnosis, modernization policy, cloud migration, or how to proceed with a PoC, consult SMILE.<\/p><ul class=\"smile-list\"><li>We clarify current state and technical assessment.<\/li><li>Visualize risks and response priorities<\/li><li>We design a phased roadmap and PoC.<\/li><\/ul><a class=\"smile-article-cta__button\" href=\"\/en\/contact\/\">Contact Us<\/a><\/section>\n\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Blog2026.06.17 What Is a Legacy System? Challenges...&nbsp;<a href=\"https:\/\/smilesoftware.org\/en\/%E3%83%AC%E3%82%AC%E3%82%B7%E3%83%BC%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%81%A8%E3%81%AF%E8%AA%B2%E9%A1%8C%E3%83%AA%E3%82%B9%E3%82%AF%E3%81%A8%E5%88%B7%E6%96%B0%E3%82%AF\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">What is legacy system? Clear guide to issues, risks, renewal, and cloud migration [2026 Edition]<\/span><\/a><\/p>","protected":false},"author":2,"featured_media":4509,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_themeisle_gutenberg_block_has_review":false,"_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[32],"tags":[],"class_list":["post-4518","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"rttpg_featured_image_url":{"full":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen.png",1536,1024,false],"landscape":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen.png",1536,1024,false],"portraits":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen.png",1536,1024,false],"thumbnail":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen-150x150.png",150,150,true],"medium":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen-300x200.png",300,200,true],"large":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen-1024x683.png",1024,683,true],"1536x1536":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen.png",1536,1024,false],"2048x2048":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen.png",1536,1024,false],"trp-custom-language-flag":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen-18x12.png",18,12,true],"neve-blog":["https:\/\/smilesoftware.org\/wp-content\/uploads\/2026\/06\/redmine-1298-redmine-1298-featured-imagegen-930x620.png",930,620,true]},"rttpg_author":{"display_name":"\u7b20\u539f \u840c","author_link":"https:\/\/smilesoftware.org\/en\/author\/chinh-man\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/smilesoftware.org\/en\/category\/blog\/\" rel=\"category tag\">\u30d6\u30ed\u30b0<\/a>","rttpg_excerpt":"Blog2026.06.17 \u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306f\uff1f\u8ab2\u984c\u30fb\u30ea&hellip;&nbsp;Read More &&hellip;","_links":{"self":[{"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/posts\/4518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/comments?post=4518"}],"version-history":[{"count":1,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/posts\/4518\/revisions"}],"predecessor-version":[{"id":4531,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/posts\/4518\/revisions\/4531"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/media\/4509"}],"wp:attachment":[{"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/media?parent=4518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/categories?post=4518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smilesoftware.org\/en\/wp-json\/wp\/v2\/tags?post=4518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}