Meet Furuwaku — Your furusato nozei, on track

Finance

Furuwaku

Your furusato nozei, on track

What Furuwaku does

Furuwaku is a private companion for Japan's furusato nozei (hometown tax) season. Start by estimating your donation ceiling: enter your gross salary, family situation, social-insurance premiums and other deductions, and Furuwaku computes your estimated limit — shown as both a standard figure and a deliberately conservative band, because the worst outcome in this system is donating past your cap and turning a 2,000-yen deal into a plain donation.

Then log every donation as you make it, whichever portal it came from. Rakuten, Furusato Choice, Satofull, Amazon — each site only remembers its own orders, so people who shop across portals end up reconciling totals in a spreadsheet every December. Furuwaku is the one ledger above all of them: municipality, amount, date, portal and the return gift you chose, with your year-to-date total and remaining allowance always one glance away.

The paperwork is where most of the real money is lost. Each donation carries its own one-stop exception checklist — application form received, filled in, ID copies attached, mailed, arrival confirmed — with the hard January 10 must-arrive deadline front and center and a clear warning when you pass five municipalities and one-stop stops being an option. If you file a tax return instead, flip a switch and Furuwaku reorganizes the checklist around the February–March filing window.

No account, no sync, no tracking. Everything is stored on your device with SwiftData and works fully offline — your income figures and donation history never leave your phone.

• Donation-limit estimator with standard and conservative bands • One ledger for donations across every portal • Per-municipality one-stop exception checklists with the five-town warning • Year-end dashboard: remaining allowance, Dec 31 and Jan 10 countdowns • Return-gift log so you never re-order a dud • 100% offline and account-free

Download Furuwaku before your next donation and finish the year exactly at your limit — with every form mailed.

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Limit estimator — Enter gross salary, spouse and dependent status, social-insurance premiums and major deductions (iDeCo, mortgage); the app computes the estimated furusato nozei ceiling using the standard resident-tax formula and shows a standard figure plus a safer conservative band, with inputs editable any time as bonuses land.
• Municipality donation log — Add each donation with municipality, prefecture, amount, date, portal and return gift; entries group by municipality with per-town and year-to-date totals, and a list view filterable by year and portal.
• One-stop paperwork checklist — Every donation carries a one-stop exception checklist — form received, filled, ID copies attached, mailed, arrival confirmed — with the January 10 must-arrive deadline shown per item, an automatic warning at the five-municipality cap, and a tax-return mode that swaps the checklist for filing-season steps.
• Year-end allowance dashboard — Home screen with a ring gauge of allowance used vs. remaining against the estimated limit, countdowns to December 31 and January 10, and a list of donations with unfinished paperwork so nothing is left unmailed.

Why we built it

Furusato nozei donors must stay under an income-dependent deduction ceiling, reconcile donations scattered across multiple portals that each only show their own orders, and get a physical one-stop exception form to every municipality by a hard January 10 must-arrive deadline — overshooting the limit or missing one for…

What makes it different

Unlike Zakatly (an Islamic zakat calculator for a flat 2.5% religious obligation with no government paperwork), Furuwaku models Japan's income-bracket-dependent furusato nozei ceiling and the one-stop exception bureaucracy around it; and unlike Satofull or Rakuten's apps, it is portal-neutral, account-free and fully o…

Who it's for

Freelancers, contractors, and small-business owners who want their numbers right at tax time without renting a SaaS to do it.

In one line: Your furusato nozei, on track

Try it

See the Your furusato nozei, on track for the full feature list, the info table, and support links.

Use Furuwaku, found a bug, or have a feature request? Comments are open below — anonymous is fine.