A solo studio in Obi, run by Jérôme Sadou — quietly making things since 2010. First for clients, now for the studio's own products.
Ohayo (おはよう) is the Japanese word for good morning. It implies the time before anything has happened yet — the quiet bit at the start of the day, before the noise.
I build small, focused apps — the kind that do one thing well and then get out of the way. Not the kind that wants your attention, your streaks, your push notifications, or your seventeen minutes a session.
After ten years of client work, I stopped taking clients in 2020. My day job since then has been engineering at a medical-field company. Ohayo runs quietly on the side, and Pokeibo is the first product to ship from it.
— Jérôme SadouA household-expense tracker that stays on your phone. Import your PayPay Card CSV once a month and watch your spending sort itself by merchant. No accounts, no bank linking, no streaks, no nagging — your data never leaves the device.
A personal publication about things worth paying attention to — objects built to last, design that justifies itself without shouting, and corners of Japan that don't show up on the first page of results. Slow, deliberate, written from a single point of view. Named after Porsche colour code 415.
Tools we built for ourselves and then shared.
The Rails 8 template we fork into every Ohayo site — including this one.
A Rails 8 content template. Brand identity — palette, fonts, logos, navigation, copy — lives in a single Setting record, editable from /admin. Fork it, rebrand from the admin, deploy. Quietly opinionated about typography, bilingual content, and slow software.
Run by Jérôme Sadou from Obi — a quiet former castle town in southern Kyushu, sometimes called the Little Kyoto of Kyushu (九州の小京都). A guy who likes the outdoors but ends up in front of his Mac more than he'd care to admit.
More on me at jeromesadou.com/apropos. If you'd like to write — about the work, the products, or a problem you'd like a small app to quietly solve — please do.