How to use
- Paste the value into the validation field. \n
- Review format and check-digit feedback. \n
- Fix the input if needed — nothing is sent to a server.
What it's for
Validate Japanese My Number check digits.
About the document
My Number (individual number) is a 12-digit Japanese ID with a modulo-11 check digit.
Also useful
Need an example? Try the My Number generator.
FAQ
- Does this query official databases?
- No. Validation is algorithmic and local only.
- Does data leave my browser?
- No. Everything runs locally on your device.
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