I'm a student developer and product builder based in Tokyo. I build web, mobile, and AI products—especially learning tools, developer utilities, and practical AI workflows.
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A Chinese learning app for building vocabulary through HSK word lists, quizzes, audio, and progress tracking—with learning data synced across devices. Platforms: Web · iOS · Android Product · Web app · App Store · Google Play |
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A native usage monitor for Claude Code, Codex, and Copilot CLI that turns local session data into clear daily, weekly, and rate-limit views. Platforms: macOS · Windows |
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An offline-first Japanese handwriting keyboard with furigana, dictionary-backed candidates, and kana-kanji conversion for both handwritten and romaji input. Platforms: Android · iOS |
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An Android utility for assigning a locale to any installed app—including apps missing from the system's standard “App languages” screen. Platform: Android 13+ · Shizuku |
- China Rail MCP — A read-only MCP server for official 12306 station search, timetables, fares, seat availability, train numbers, and stop sequences—without booking or account automation.
- Japan Rail MCP — A Shinkansen-first, read-only MCP server with a credential-free station catalog and live timetables, fares, seat classes, and stops when an Ekispert API key is configured.
- MCP Mail Core — A safety-first, multi-account mail MCP core and provider contract for Gmail, QQ Mail, and iCloud Mail integrations.
- Silkroad MCP — A catalog of MCP servers, reusable components, blueprints, and templates for Asian services, devices, and standard protocols.
| Area | Tools |
|---|---|
| Mobile | Swift, SwiftUI, Kotlin, Android, Jetpack Compose |
| Web | TypeScript, React, Next.js |
| AI & Backend | Python, MCP, Supabase |
| Infra | Vercel, EdgeOne |