The Individual Numbers(マイナンバー), each one unique to its holder, are important because they are required for procedures at municipal offices, etc.
Starting at October 2015, your municipality has mailed an envelope to your residence (at the address registered therewith).
The envelope contains a “Notification Card”(ツウチカード） with your Individual Number on it.
You can obtain your “Individual Number Card” (個人番号カードKojin Bango Ka-do) by filling in and sending back the application provided with the “Notification Card”.（通知カード）
Handle your Individual Number(マイナンバー） with care!
Keep your Notification Card at hand and be careful not to throw it away or tear it.
To avoid illegitimate use of your Individual Number, do not tell it to others except as required.
“Individual Number Cards”（個人番号カードKojin Bango ka-do) will be available!
Your “Individual Number Card” also serves as an ID card bearing your Individual Number.
In some municipalities, convenient options like having convenience stores issue residence certificates are available.
If you have any questions
Go to the site below, or call the number below. You can also contact the municipal office of the town where you live (your municipality).
https://www.cao.go.jp/bangouseido/foreigners/index.html( other Languages )
0570-20-0291 (English / Chinese / Korean / Spanish / Portuguese)
[From 1 October 2015 through 31 March 2016]
Monday – Friday 9:30 – 20:00 Weekends/holidays 9:30 – 17:30
(Not available during the New Year’s holidays)
*Phone call will be charged because of 0570 Dial service
Based on information from Sapporo city