家計簿

Kakeibo (家計簿, “household account book”) is a Japanese budgeting and reflection method created by Motoko Hani (羽仁もと子) in 1904 for Fujin no Tomo (婦人之友, “Women’s Friend”) magazine. It’s one of the oldest personal finance systems still in use—and it works for debt payoff because it’s built on awareness, not just tracking.

Historical context

Motoko Hani was Japan’s first female journalist. She designed Kakeibo for readers to write by hand each month. The insight is psychological: the act of writing creates clarity that digital entry often doesn’t. Research (e.g. NHK World, 2019) suggests Kakeibo practitioners save around 35% more on average. The lever isn’t a fancy app—it’s the monthly pause and four questions.

The four Kakeibo questions (and how they help with debt)

1. How much do I have? — Your income. You can’t allocate what you don’t measure. Knowing your number is step one for any debt plan.
2. How much am I spending? — Fixed and variable expenses. This is where “leaks” show up. Every dollar you trim can go to debt.
3. What must go to debt? — Your minimum debt payments. Treat this as non-negotiable. Our dashboard Kakeibo tab calculates this from your entered debts.
4. How can I improve? — Surplus = income − spending − debt. Send that surplus to your highest-APR debt (avalanche). That’s Kaizen: small, consistent improvement.

Three debt payoff applications

• Use the four questions monthly. Don’t check balances daily—that fuels anxiety. Once a month, answer the four questions and adjust the next month’s plan. That’s 間 (Ma): the pause.
• Write one “improvement” action. Each month, commit to one change: one subscription cut, one extra $20 to the top debt, or one no-spend day. Small steps compound (改善, Kaizen).
• Before buying, ask: is this もったいない? Mottainai means “what a waste.” If a purchase would be wasteful, put that money toward debt instead.

Try the Kakeibo calculator page