Individual_Number_(Japan)
An Individual Number (個人番号, kojin bangō), also known as My Number (マイナンバー, mai nambā), is a twelve-digit ID number issued to all citizens and residents of Japan (including foreign residents) used for taxation, social security and disaster response purposes. The numbers were first issued in late 2015.[1][2][3]
There are pros and cons regarding efficiency when using Basic Resident Registers Network and Number System .[4]