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Hi, I’m CheerChen.
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Dissecting the Switch 2 GameChat Backend: Multi-Region SFU and DynamoDB Consistency Trade-offs
2026-06-26T20:30:00+09:00
Background
A public backend talk from Nintendo is a rare thing. At AWS Summit Japan 2026, session CDN221 “The Technology Behind GameChat” (「ゲームチャットを支える技術」) walked through the service design behind GameChat, a built-in feature of Nintendo Switch 2. The speakers came from the System Development Department at Nintendo Systems Co., Ltd. (ニンテンドーシステムズ株式会社). That affiliation itself is worth noting: Nintendo Systems is not Nintendo proper but a joint venture Nintendo and DeNA founded in 2023, mainly responsible for developing the systems behind Nintendo’s online services.
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CheerChen
Behind TBS's Large-Scale Interactive Live Streaming: AWS Serverless Design — AWS Summit Japan 2026 Recap
2026-06-26T12:00:00+09:00
Background
At AWS Summit Japan 2026, the session “Behind TBS TV’s ‘LOVE it!’ Large-Scale Streaming and AWS Serverless Design” (「TBSテレビ『ラヴィット！』大規模配信の裏側と AWS サーバーレス設計」) featured Mr. Kameda, Technical Product Lead in the Future Technology Innovation Division of TBS Television’s Media Technology Bureau, walking through the technical design of Kustamie, an interactive streaming platform. The session focused on a two-way live streaming scenario at a scale of tens of thousands of users: deliver low-latency video and real-time interaction reliably while protecting the API, database, and backend services from concentrated traffic spikes.
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CheerChen
Behind the Scenes of Cross-Platform Play in "Monster Hunter Wilds" — AWS Summit Japan 2025 Retrospective
2025-06-26T12:05:26+09:00
Background
Within just one month of release, Capcom’s Monster Hunter Wilds surpassed 10 million copies sold worldwide. As the franchise’s first title to support cross-platform play, it reached millions of concurrent connections at launch. How did players actually feel about it? From the open betas to the official launch, player feedback voiced plenty of frustration over PC performance, content pacing, and slow updates—yet multiplayer networking received overwhelmingly positive reviews.
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CheerChen
How Did PlayStation™Network Voice Chat Migrate to Amazon EKS? — AWS Summit Japan 2025 Session Recap
2025-06-26T05:25:26+09:00
Background
Voice chat is an application that requires a “long-lived connection lifecycle,” and migrating this kind of service to Amazon EKS is notoriously difficult. Sony Interactive Entertainment’s (SIE) session on migrating the PSN voice chat servers stood out for its technical depth among a sea of watered-down talks (one automaker is still “moving to the cloud,” 50% done), and it left a strong impression on me, bringing back memories of my own years wrestling with Kubernetes. Anyway, on to the agenda.
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CheerChen
JINS AI: Bringing Generative AI to Physical Retail — AWS Summit Japan 2025 Retrospective
2025-06-25T12:00:26+09:00
Background
On Day 1 (June 25) of AWS Summit Japan 2025, during a session titled “アイウエア接客の未来を拓く～生成 AI で進化するあたらしい店舗体験への挑戦～” (Pioneering the Future of Eyewear Customer Service: Challenging New In-Store Experiences Evolving with Generative AI), eyewear retailer JINS shared the development journey, design details, and practical hurdles behind launching JINS AI.
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CheerChen
Links
- GitHub — http://github.com/CheerChen
- Tokyo Art Calendar — https://art-calendar-tokyo.pages.dev/
- 水樹奈々 | ライブセットリスト・歌唱回数/分析 — https://nana-live-acc.pages.dev/