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Japanese My Number Personal Code

Published on Sep 2, 2026

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An Individual Number also known as My Number is a 12-digit ID number issued to all citizens and residents of Japan including foreign residents in Japan. It is used for taxation, social security, and disaster response purposes.

Validator

Japanese My Number for personal — Validates the position weighted checksum.

Matched expressions

Regex expressions	Description	Score
`\b\d{12}\b`	Matches a 12-digit number of the format NNNNNNNNNNNN.	1

Ignored expressions

None

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