01AI / Knowledge retrieval

Bible Assistant

A study assistant that separates source text from AI explanation and keeps citations easy to verify.

  • Next.js
  • OpenAI Responses API
  • Web search
  • Citation design
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02AI / Japanese building regulation

AI Japan Building Regulation Assistant

A conversational research assistant that organizes building facts and searches official e-Gov and MLIT sources for relevant Japanese regulations.

  • Next.js
  • OpenAI Responses API
  • e-Gov / MLIT retrieval
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03AI / Japanese learning

AI Japanese Assistant

A Japanese practice assistant for university interviews and campus life that explains natural rewrites and the reasons behind them.

  • Next.js
  • OpenAI Responses API
  • NINJAL / Japan Foundation
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04AI / Daily intelligence

Daily News Assistant

A source-grounded daily assistant for major reporting, official updates, and public X posts from technology companies and Elon Musk across Japan, the United States, and Europe.

  • Next.js
  • Cloudflare Cron
  • Durable Objects
  • OpenAI Responses API
  • X API
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05Privacy / Image forensics

Image Provenance Inspector

A browser-local tool for inspecting EXIF, GPS, capture devices, file hashes, and IP notation visibly present in an image.

  • Next.js
  • exifr
  • Tesseract.js
  • Web Crypto API
  • OpenStreetMap
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06Language learning / Daily practice

Daily Japanese & English Shadowing

A Tokyo-dated archive with one complete 30-minute C1+ Japanese speech plus 30 minutes of C1+ English speech and small talk.

  • Next.js
  • Cloudflare Cron
  • Durable Objects
  • Piper Plus
  • ONNX Runtime Web
  • OpenAI Responses API
  • Web Audio API
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