Field Notes
An open journal of what actually happens while building Teasan. Sourcing trips in rural Japan, pop-up updates, small wins, and any spectacular faceplants.
006 · 18 October 2026
A love letter to persimmon leaf tea
I'm back in Japan to visit the farmers who grow my teas, and I spent this past week in Izumo for persimmon harvest season.
005 · 6 October 2026
Opening up global pre-orders
Pre-orders are now open to everyone, globally. Plus what went wrong in September, and how pre-orders run from now on.
004 · 17 September 2026
Celebrating our first wholesale account
We closed our very first wholesale account!
003 · 13 September 2026
How we blend our teas
The short answer is: I go off of vibes.
002 · 30 August 2026
Why I left tech to start Teasan
In May, the universe decided for me: I got laid off from my job.
001 · 14 August 2026
A first hello, and a first press feature
Hi, I’m Keika, the founder of Teasan, and this is the first entry of Field Notes: a journal of what actually happens while building this brand.