30 October 2026
Three months shipping in Tokyo
Draft — edit me from /admin.
一 · Small diffs, big numbers
At 24M+ monthly users, a two-line change to checkout is a feature. The discipline is in measuring it.
二 · Tests are a kindness
Playwright E2E coverage across cart, coupons and checkout meant every release was a little less scary.
三 · Kaizen
Improve a little, every day. It compounds.