Ayumi Sato

I grew up watching my grandmother open a small brown notebook every evening at the kitchen table. She called it her kakeibo — the household ledger that Motoko Hani introduced to Japanese women in 1904. She kept it for fifty years. After she died, I inherited the whole shelf of them.

I did not plan to become a writer about money. I spent my twenties in a Japanese trading company, working the hours that role expects, and I kept a spreadsheet budget that was correct and unhelpful. In my early thirties I left to write full-time. Around the same time I opened my grandmother's first ledger and read her handwriting in the margins — too much on New Year's gifts this year, saved on utilities by closing the rooms we don't use — and understood, for the first time, what she had actually been doing.

Mindful Yen is the record of my return to that practice, now in a hybrid digital-paper form. Notion for the daily log. A paper journal for the monthly reflection. Four categories. Four questions. The same structure my grandmother used, translated into the tools available to me.

What Mindful Yen is for

I write for readers outside Japan who suspect that the English-language personal finance conversation has been optimising for the wrong thing. Not more income, not faster optimisation, not passive streams — but attention. The kakeibo answer to money questions is almost always the same: write it down, sit with it at the end of the month, adjust gently, keep going for decades.

I am sceptical of optimisation-as-lifestyle. I am sceptical of tools that demand more of you than the practice itself. I am sceptical of any advice that promises to make your financial life easier without first asking you to look at it honestly.

The practical side

I run a small shop on Etsy with printable kakeibo journals and planners built on the traditional four-category structure. I maintain a free Notion template that I use for my own daily log. And I send a short essay once a week through Substack, free, on money and attention.

Everything on Mindful Yen exists downstream of one belief: that the slow, written practice my grandmother kept for fifty years has more to teach the rest of the world than most of us have noticed. I am writing, slowly, to share it.