Free Japan phone number validator

Check any Japan number (+81): valid or not, mobile or landline, original carrier, and the correct international format.

How Japan numbers are written

Country code +81. Locally: 090-1234-5678. Internationally: +81 90-1234-5678.

Validate Japan numbers in bulk or by API

Clean a CSV of up to 50,000 numbers, or call the API from your app or AI agent with "default_country": "JP". 250 free lookups.

Start free