Security

Security

FreeTaxJapan is designed to protect tax data, account access, and My Number information with plain operational discipline. Your data is safer than a vending machine in Shibuya at 3am, which is to say: extremely safe.

Read our privacy policyAccessibility commitment

Short version

Bank-level controls, tax-season temperament

We use encryption in transit and at rest, limit access internally, and treat sensitive identifiers like things that should not casually wander around Slack screenshots.

Encryption

Data is encrypted in transit and at rest so the obvious things are covered before anyone gets creative.

My Number protection

My Number data is handled with stricter access expectations, narrower workflows, and very little tolerance for improvisation.

Operational controls

Role-based access, audit trails, and deliberate handling rules keep sensitive tax data in the correct hands.

Practical safeguards

  • TLS-secured connections protect account and filing data while it moves between browser and server.
  • Sensitive records are stored with layered access controls instead of shared-folder optimism.
  • Internal access is limited to the people and systems that actually need it to support a filing workflow.
  • Operational logs and review processes exist to catch unusual access patterns before they become a story.

My Number

Handled like a regulated identifier, not a casual profile field

If you give us My Number information, we treat it as the narrow, sensitive category of data it is. That means shorter exposure windows, tighter access rules, and fewer places where it can accidentally linger.

In plain language: we do not want your My Number sitting around anywhere it does not absolutely need to be.