My Number Card: Complete Guide for Foreigners
Every resident in Japan is assigned a 12-digit My Number (マイナンバー) for tax, social security, and disaster response. The optional My Number Card serves as a photo ID and enables digital services like e-Tax and convenience store certificates. Applying is free and increasingly beneficial as it replaces the health insurance card.
| Item | Notification Letter | My Number Card |
|---|---|---|
| Format | Paper | Plastic with IC chip |
| Photo ID | No | Yes |
| Digital Services | No | Yes |
| Cost | Free (auto-issued) | Free (apply) |
How to Apply
Step 1: Find Your Number
Check your notification letter mailed after address registration. Lost it? Request a resident certificate with My Number at the city office.
Step 2: Submit Application
Apply online (QR code on notification), by mail, or at supported photo booths. You need a passport-style photo.
Step 3: Pick Up
After 1–2 months, visit city office with pickup notice, notification letter, Residence Card, and photo ID. Set your 4-digit PIN at pickup.
Uses
- File taxes online (e-Tax)
- Print certificates at convenience stores
- Health insurance card (integration ongoing)
- MynaPortal for government services
Q: Is sharing my My Number safe?
Only share with employers, financial institutions, and government offices as required by law. The number is on the back of the card.
Q: What happens to the card if I leave Japan?
It becomes invalid when you deregister your address. If you return, you need a new card but your number stays the same.
※ This article is for informational purposes only. My Number services are expanding. Check your city office for updates.
