20-year-old foreign resident mistakenly registered under another's identity in Japan's "My Number" ID system.

Japan's "My Number" ID system caused a six-month mix-up, leading a foreign resident to live under a false identity. A man in his 20s, with a name, nationality, and birthday identical to another, was mistakenly registered at Tokushima City Hall. The error was discovered by the national pension service, raising concerns over human error and data leaks in the ID number system.