Software engineer based in Tokyo, building AI agent platforms and web products in TypeScript. Currently going deeper into systems programming with Rust.

• AI agent / RAG platforms — production systems built with TypeScript, Mastra, Cloudflare Workers, PostgreSQL (Drizzle), Redis, and the AI SDK
• Web products — Next.js / React / Astro, from design (Figma) to deployment
• Systems programming — writing a toy x86_64 OS in Rust (UEFI boot, bare metal), studying concurrency in C

Contributing to the tools I use in production:

• Mastra — TypeScript AI agent framework
• Hono — web framework for the edge
• Biome — Rust-based toolchain for the web

• Blog: octomblog.com (Japanese; English posts on the way)