What My Number Is

A practical guide to Japan’s personal ID number system and when you may need it.

My Number is Japan's 12-digit personal ID number for residents. It is used in tax, employment, and government procedures.

After residence registration, a notice is sent to your registered address. You can also apply for the optional My Number card with a photo.

You may need it for employment, tax filing, some insurance procedures, and parts of banking and government paperwork.