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Product designer & engineer · Design × frontend × AI · Japan

Changing how people work, through design and AI.

Ten years of B2B product design and 3+ years leading frontend. I've helped a paper-run welfare business onto digital workflows, cut a booking flow's peak-season inquiries from 200+ a week to about four, and built a first design system for a team that had none. Now I build LLM features into real operations, with a person at every decision that matters.

10 yrs B2B product · 3+ yrs frontend lead

Booking redesign: 200+ → ~4 inquiries/week

Paper-run welfare operator → ~100 staff on digital workflows

LLM systems built for 2 client businesses, with human review gates

Process

How I work

Understand the operation

Start from how the work is done today — on paper, in spreadsheets, in people's heads — and what the business actually needs to change.

Decide who decides

Design the system and its review points: what's deterministic code, what an LLM drafts, and what a person must sign off.

Design and build it

Interface and production frontend in one head, so trade-offs are made once instead of traded across a handoff.

Prove it and make it stick

Tests, evaluation and field feedback until the team uses it every day, plus a design system so it stays consistent after I leave.