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
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.
Choose your filing path
Personal and corporate returns are separate flows, so you only see the steps that apply to you.
Personal tax
Individual filing flow
Follow the guided personal path for residency, employment slips, income, deductions, review, and package generation.
Corporate tax
Separate company workspace
Keep corporate setup, fiscal-year data, manual inputs, package prep, and future eTax/eLTAX handoff separate from personal returns.
Kunai
Track finances over time
Use Kunai as your year-round tracking workspace for receipts, expenses, and draft tax records, then sync ready rows into filing when you need them.
The TaxNinja toolkit
Three tools that share the same data. Use whichever fits where you are — filing now, keeping records through the year, or running a company’s books.
Ledger
The guided filing flow
The step-by-step personal return. It walks you from residency and income through deductions to a print-ready NTA package.
How it works
- 1Answer a short set of residency and income questions.
- 2Add your income items and deductions.
- 3Check the estimate, then generate the PDF bundle.
Kunai
Your year-round record book
A spreadsheet-style ledger for logging receipts, expenses, and income as they happen, so filing season is not a scramble.
How it works
- 1Add rows by hand, from a CSV, or from a receipt photo.
- 2Tidy the category and mark the rows that are ready.
- 3Sync the ready rows into your filing when the time comes.
Shuriken
Company statements (admin)
The back-office cockpit for a company’s P&L, balance sheet, and cash flow, edited like a spreadsheet. Admins only.
How it works
- 1Fill the statement grids cell by cell.
- 2Pull figures from Kunai or the corporate workspace.
- 3Review the totals before they feed corporate filing.
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 fills verified official National Tax Agency forms from your canonical data. If a required year-specific template, mapping, or fact is missing, generation stops instead of adding a blank form. Every output remains a user-prepared draft for explicit review.
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.