Active products, public demos, open-source software, experiments, and archived work are listed with personal contribution, outcomes, stable IDs, and sources.
3 projects
A service that quickly turns HTML or ZIP files into shareable websites.
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure / Operations and growth
OutcomeOperated a web service for instantly publishing HTML and ZIP files
An iPhone app that combines location data, short videos, maps, and timelines to preserve travel moments as stories.
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure / Operations and growth
OutcomeDesigned and developed using Expo / React Native, and published as an iPhone app on the App Store / Implemented experiences with location data, short videos, maps, timelines, and automatic VLOGs / Built mobile CI/CD using GitHub Actions / Handled App Store review and implemented feature-flag-based controls
An API that corrects spoken technical Japanese and transcripts using context and domain vocabulary.
Personal contributionIdeation / UI design / Frontend / Backend / AI & Model Design / Infrastructure / Operations and growth
OutcomeProvided a public demo of the Japanese technical transcription correction API
1 project
Model/API experiments for Japanese reading and pronunciation estimation and TTS preprocessing
Personal contributionIdeation / Backend / AI & Model Design / Infrastructure / Operations and growth
OutcomeAchieved 100% on the 66-question difficult reading test and 91.9% on the independent evaluation of 260 questions / Published the model, API, and evaluation results
10 projects
A read-only MCP server built with Cloudflare Workers that provides search and retrieval of public X/Twitter data
Personal contributionIdeation / Backend / Infrastructure / Operations and growth
OutcomeOperated and open-sourced a read-only MCP server handling public X data
A gateway adapter for safely using Hermes Agent from Rabbit R1
Personal contributionIdeation / Backend / Infrastructure
OutcomeOpen-sourced a gateway connecting Rabbit R1 and Hermes Agent
A Chrome extension that writes ChatGPT, Claude, and Gemini conversations into Markdown locally
Personal contributionIdeation / UI design / Frontend / Operations and growth
OutcomeOpen-sourced an extension that converts ChatGPT, Claude, and Gemini conversations into Markdown
Team wellness dashboard that shares and visualizes data from Oura Ring and Health Connect.
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure
OutcomeOpen-sourced a data-sharing dashboard for Oura and Health Connect
An unofficial CLI and watcher that continuously backs up my Tapo Care cloud recordings.
Personal contributionIdeation / Backend / Infrastructure / Operations and growth
OutcomeOpen-sourced CLI/watcher for continuous preservation of Tapo Care recordings
A free and unlimited clipboard history extension for macOS and Raycast
Personal contributionIdeation / UI design / Frontend / Operations and growth
OutcomeOpen-sourced free and unlimited clipboard extension for Raycast
A tool for resizing and re-compressing images entirely within the browser without sending them to a server
Personal contributionIdeation / UI design / Frontend / Infrastructure
OutcomeOpen-sourced a tool that processes images entirely in the browser without uploading them
A real-time card voting PWA for deciding what to do next as a group
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure
OutcomeOpen-sourced real-time card voting PWA
A programmable network experiment using Cloudflare Workers and WebRTC
Personal contributionIdeation / Backend / Infrastructure
OutcomeOpen-sourced network experiment using Cloudflare Workers and WebRTC
A real-time web tool that converts Japanese addresses to English format as you type
Personal contributionIdeation / UI design / Frontend / Operations and growth
OutcomeOpen-sourced web tool for instant conversion of Japanese addresses to English format
3 projects
A demo that turns voice memos into actionable instructions for Hermes, Claude Code, Codex, and ChatGPT.
Personal contributionIdeation / UI design / Frontend / Backend / AI & Model Design / Infrastructure
OutcomeProvided a public demo of creating work instructions for AI agents from speech
A blog experiment using World ID so that only verified humans can read it.
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure
OutcomePublicly tested a blog experience that requires proof of personhood
An experimental pet diary app that transforms browser camera recordings into AI-generated diaries
Personal contributionIdeation / UI design / Frontend / Backend / AI & Model Design / Infrastructure
OutcomePublicly tested a pet-focused experience that turns camera recordings into an AI diary
Why each project ended, paused, or transferred, and what I learned from it.
An AI chatbot for LINE. It grew to more than 10,000 friends on LINE before the business was transferred.
Personal contributionIdeation / UI design / Backend / AI & Model Design / Infrastructure / Marketing / Operations and growth
OutcomeMore than 10,000 friends on LINE / Business transfer
Why it ended or transferredI stopped developing and operating the product when the business was transferred.
Lessons learnedEmbedding the product in a channel people already use daily was a major driver of early growth. / A business transfer after growth requires a clear handoff of operational responsibility and knowledge.
A voice-based social app for Gen Z built around short voice posts. It was publicly tested in 2024.
Personal contributionIdeation / UI design / Frontend / Backend / Infrastructure / Operations and growth
OutcomeLaunched a public test of the Gen Z voice social app in July 2024 / Used the public test to validate usage assumptions and operational requirements
Why it ended or transferredEnded the time-boxed test and discontinued the service.
Lessons learnedA voice social product must design for its initial community and moderation, not only its feature set. / The trial provided evidence for deciding whether to continue development within a short period.