⚠️ This site is NOT tax advice — it is a tool to help you prepare your own filing. Always verify amounts before submitting.

TaxNinja JP

Japan Expat Cloud Accounting & Tax Platform

Japan tax filing, in plain English.

A guided residency and deduction wizard — mostly yes / no questions — turns your answers into a print-ready, NTA-compliant PDF bundle with every form your situation requires. Typically under 45 minutes.

  • 年末調整Year-end adjustment
  • 確定申告Final return
  • 青色申告Blue return
  • 不動産所得Rental income
  • 仮想通貨Crypto
  • 外国税額控除Foreign tax credit
  • ふるさと納税Furusato nozei
Start my tax returnI already have an account

Drafts are stored on a network-isolated server, scoped to your account, and protected by a CSRF-hardened session. APPI-aligned: export or delete everything anytime. How we handle your data →

⚠️ This site is NOT tax advice — it is a tool to help you prepare your own filing. Always verify amounts before submitting.

For every expat

Salaried (給与所得者), sole proprietor (個人事業主), landlord, crypto trader, investor, or departing Japan mid-year. Non-Permanent Residents and Permanent Residents both handled — with the right 5-of-10-year classification up front.

Real NTA forms

The bundle includes every official National Tax Agency form your situation needs, alongside a bilingual Personal Records Copy that maps each computed amount to the exact field on the Japanese form. Print, sign, mail or walk it in.

English cover letter

A Next-Steps Guide tells you which forms to print, which tax office (税務署) to submit to — resolved from your postal code — and how to pay. All before March 15.

What TaxNinja does for you

  • Residency-aware wizard (NPR vs PR vs Non-resident vs Departing).
  • Income triage across employment, sole-prop, real-estate, crypto, foreign income.
  • Deduction wizard: 国民健康保険, 国民年金, iDeCo, ふるさと納税, 医療費, 住宅ローン, 扶養, etc.
  • Double-entry ledger running invisibly under a card-based "inbox" UI.
  • Review dashboard with live refund / owed estimate.
  • PDF package with cover letter and pre-addressed envelope label.
  • CSV ledger import (English or Japanese headers) and per-exchange crypto-CSV import (bitFlyer / Coincheck / Binance JP).
  • Built-in real-estate depreciation calculator (NTA 耐用年数, straight-line + declining-balance).
  • AI sanity-check (Claude) that flags likely mistakes before you file, plus a multi-turn chat for Japan-tax questions.
  • Full UI in English, Japanese, Simplified Chinese, and Traditional Chinese.

Coming next

These are on the active roadmap. Toggleable behind feature flags so they ship as soon as their external dependency lands.

  • Direct submission to e-Tax (NTA XML) — XML export already available; full submit needs NTA certification + My Number Card NFC.
  • Bank / credit-card auto-sync (Moneytree LINK) so the ledger fills itself.
  • Receipt OCR — snap a photo, the line lands in the ledger with the right category.
  • Auto-fill official NTA PDFs (form 01 / ref1 / 11) field-by-field.
  • Marketplace to book a licensed 税理士 for a final review.
  • In-app payment of the tax owed (Pay-easy / credit / 振替納税).

Your feedback shapes which ships first — leave a note in the feedback widget after filing.