⚠️ 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 PDF bundle built on the NTA form layouts, ready for you to review, sign, and submit. Many simple returns finish in one sitting.

  • 申告要否Do I need to file?
  • 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 accountEstimate your tax

Drafts are stored server-side, scoped to your account, and protected by a CSRF-hardened session. Built around APPI obligations: export or delete your data 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

Individuals and freelancers

Employees, freelancers, and sole proprietors file here. Guided path for residency, employment slips, income, expenses, deductions, review, and a print-ready package.

Start personal tax

SMB tax

Registered company workspace

For 株式会社, 合同会社 and other registered companies. Keeps company setup, fiscal-year data, inputs, and package prep separate from personal returns.

Sign in for SMB tax

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.

Sign in for Kunai

The TaxNinja toolkit

Tools that share the same data: file now, keep records year-round, run company books, and talk to AI behind Kemuri protection.

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

  1. 1Answer a short set of residency and income questions.
  2. 2Add your income items and deductions.
  3. 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

  1. 1Add rows by hand, from a CSV, or from a receipt photo.
  2. 2Tidy the category and mark the rows that are ready.
  3. 3Sync the ready rows into your filing when the time comes.

Shuriken

Company statements

The SMB accounting layer for a company’s P&L, balance sheet, and cash flow. Classify Kunai transactions, then push approved totals into SMB filing.

How it works

  1. 1Fill or review statement grids.
  2. 2Preview a transfer from Kunai and resolve review-required rows.
  3. 3Push ready P&L totals into SMB filing inputs.

Kemuri

AI privacy layer (always on)

Before any AI chat or review call, Kemuri redacts and tokenizes identifiers such as My Number and contact details. The same protection applies for every AI provider.

How it works

  1. 1Open the assistant after optional transfer consent.
  2. 2Kemuri protects identifiers before the model sees them.
  3. 3You get restored explanations; Kemuri does not decide your tax position.

Expat taxes in Japan, explained in plain English

TaxNinja JP helps foreign residents prepare Japanese income tax returns (kakutei shinkoku / 確定申告)—covering NPR vs permanent resident rules, gensen slips, furusato nozei, and foreign tax credit—with English and Japanese guidance and print-ready NTA forms.

Browse Japan tax guides · Expat tax FAQ

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.