About

Now

• Product Manager at Sansan, working on Bill One (B2B SaaS for invoice management)
• Creator of Tegata, an open-source authorization layer for MCP
• Side contractor at IRBANK

Story

I started as a full-stack engineer. After leading the design of Bill One’s pre-approval feature — which resulted in a patent filing and coverage in Nikkei — I transitioned to a dedicated PM role in early 2026.

Why I build

The products I care about share a theme: moving human judgment into the right place in a system. At Bill One, that meant pre-approval of expenses. With Tegata, it means approval gates for AI agents.