Japan’s My Number Card Guide (2026): Why Foreigners Need It, How to Apply, and the Convenience Store Hacks Nobody Explains
Japan’s My Number Card Guide (2026): Why Foreigners Need It, How to Apply, and the Convenience Store Hacks Nobody Explains
When you register your address at your local municipal office in Japan, you will receive a official paper document called the Individual Number Notice (個人番号通知書, Kojin Bango Tsuchisho) in the mail. Inside is your unique 12-digit social security and tax ID number—commonly referred to as your My Number (マイナンバー).
While the 12-digit number is automatically assigned to every resident, the physical plastic ID called the My Number Card (マイナンバーカード) requires a separate, free application. Many foreign residents skip applying for the physical card because they already carry a Residence Card (Zairyu Card). However, major administrative updates in Japan—including the replacement of paper health insurance cards and the integration of online visa extensions—have made the plastic My Number Card essential for daily life.
Here is your step-by-step guide on how to apply for the plastic card, set it up correctly, and utilize its time-saving shortcuts.
1. What Is the My Number Card (And Why Do You Need It)?
Your 12-digit number is used by the Japanese government to track taxes, social security, and disaster management data. The plastic My Number Card acts as an official photo ID equipped with an electronic IC chip containing digital verification certificates.
Having the physical plastic card unlocks major daily conveniences for foreign residents:
- Digital Health Insurance (Myna Health Card): Traditional paper health insurance cards were phased out in late 2024. Linking your health insurance profile to your My Number Card allows you to swipe your card at clinics, hospitals, and pharmacies nationwide.
- 24/7 Convenience Store Certificate Printing: Print official government documents—such as your Resident Certificate (Juminhyo), Tax Certificate (Kazei Shomeisho), and Seal Certificate (Inkan Shomeisho)—at multi-copy machines in 7-Eleven, Lawson, or FamilyMart for a discounted fee.
- Online Visa Renewals: Submit visa extension or status change applications directly through the Immigration Services Agency's online portal using a smartphone or card reader, bypassing long waiting times at regional Immigration Bureaus.
- e-Tax Integration: File annual tax returns or claim tax adjustments online via the Mynaportal app.
2. How to Apply: The Fastest Smartphone Method
Applying for the plastic card is completely free. While you can apply by postal mail or designated photo booths, applying via smartphone is the fastest and easiest method.
- Locate Your QR Code: Find the application QR code printed on your Individual Number Notice or the QR application sheet mailed to your address.
- Scan and Register Email: Scan the QR code using your smartphone camera. The system will automatically populate your 23-digit Application ID. Enter your legal name and primary email address.
- Upload an ID Photo: Take a clear photo on a plain background. Ensure no hats, shadows, or heavy filters are used. The photo must meet official ID standards (3.5cm x 4.5cm proportions).
- Submit Application: Confirm your details and submit. You will receive a submission confirmation email.
3. Pick-Up & PIN Code Setup at City Hall
After submitting your application, card production takes approximately 4 to 6 weeks.
Step 1: Receive the Pick-Up Notice (交付通知書)
When your card is ready, your municipal office will mail a postcard called a Issuance Notice (交付通知書, Kofu Tsuchisho) to your registered address. This postcard contains instructions and details on where to collect your card.
Step 2: Collect Your Card in Person
You must pick up your card in person at the designated ward or city hall counter. Bring the following required items:
- The physical Pick-Up Notice postcard (signed/stamped if requested).
- Your physical Residence Card (Zairyu Card) or Passport.
- Your original paper Individual Number Notice / Notification Card (if you still have it).
Step 3: Set Up Your Security PIN Codes
At the municipal counter, you will be prompted to enter four distinct PIN codes on a digital keypad:
| PIN Code Name | Length | Primary Function |
|---|---|---|
| Signature Digital Certificate | 6 to 16 characters (letters & numbers) | Used for online legal procedures like e-Tax and online visa filings. |
| User Identity Verification | 4 digits | Used to log into Mynaportal and convenience store printers. |
| Visual Card Entry Assistance | 4 digits | Used for address/name change verification at municipal counters. |
| Individual Number Verification | 4 digits | Used by government software to confirm the 12-digit ID. |
Note: You can use the same 4-digit number for the bottom three numeric PINs to avoid forgetting them.
4. Crucial Rules & Expiration Traps Foreigners Must Know
- Your Card Expiration Matches Your Visa Expiration: Unlike Japanese citizens whose cards are valid for 10 years, a foreign resident’s My Number Card expiration date is strictly tied to the expiration date of their Status of Residence (Visa).
- The Renew-in-Person Rule: When you extend your visa at Immigration, your My Number Card does not update automatically. You must physically take your renewed Residence Card to City Hall before your old visa/My Number Card expires to extend the digital certificate on the card.
- The 90-Day Grace Period Trap: If your visa extension is pending, you can get a temporary 2-month extension on your My Number Card at City Hall. However, if your My Number Card expires completely, it becomes invalid, and you will have to re-apply from scratch (paying a replacement fee).
- Moving Addresses: Whenever you move to a new apartment or city, you must present your physical My Number Card during your Move-In Notification (Tennyu-todoke) so the clerk can update the address stored on the IC chip.
5. Pro-Tip: Convenience Store Document Printing Shortcut
Need a Resident Certificate (Juminhyo) for a bank account or phone contract? Instead of taking time off work to visit City Hall, follow these steps at any Seven Bank or convenience store multi-function printer:
- Touch Administrative Services (行政サービス) on the touch screen.
- Select Print Certificate (증명書発行) and place your plastic My Number Card on the designated IC card reader region.
- Enter your 4-digit User Verification PIN.
- Select the required document (e.g., Juminhyo), select whether to include your 12-digit number or household details, insert ¥200–¥300 in cash, and print instantly.
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