Privacy Policy
Last reviewed: Apr 22, 2026
TaxNinja JP is a document-preparation tool for foreign residents of Japan. This policy explains what personal information we handle, why we use it, how long we keep it, and the rights you have.
1. What we collect
We handle account basics (email, name, hashed password), tax-return inputs (residency, postal code, amounts, ledger and receipt details), and technical logs such as IP, user-agent, and timestamps. The current public version does not retain a reusable My Number value as part of normal account data.
2. Why we use it
Only to generate your tax-return package and operate the service. We do not sell, rent, advertise with, or profile your data.
3. How long we keep it
Tax-year records stay until you delete them. Generated PDFs are rendered on demand and not retained server-side. Audit logs are generally kept on a 90-day rolling basis.
4. Third parties
We do not share personal information with third parties except where required by law or by a clearly labeled integration you opt into.
5. Your rights
You can request disclosure, correction, suspension of use, or deletion of your personal information. Use dashboard settings to export or delete your data, or contact the published support channel.
6. Security measures
Passwords are hashed with bcrypt and sessions are protected with httpOnly SameSite=strict cookies. See the Security page for more detail.
7. Children
The service is intended for adults. Users under 18 should only use it with a guardian.
8. Changes
We will announce material changes at least 30 days before they take effect, in-app or by email.
Data protection officer: Contact details pending publication by the site administrator.
Important: This site is NOT tax advice. It is a tool to help you prepare your own filing.