Random Japanese Postal Code Generator
Generate real Japanese Postal Codes with verified city and region pairings. Export the results for authentic test data.
How is a Japanese postal code structured?
Japan uses seven numerical digits, conventionally written as three digits, a hyphen, and four digits. The postal mark 〒 may appear before the code on Japanese addresses.
Example structure
100-0001100Routing prefixFirst 3 digits
0001Local deliveryFinal 4 digits
- Use seven digits. The standard display inserts a hyphen after the first three digits.
- Keep leading zeroes. Both halves are fixed-width numerical strings and should not be converted to numbers.
- 〒 is optional. The postal symbol can precede a code in Japanese address layouts but is not part of the seven digits.
Frequently Asked Questions
Japanese postal codes use seven digits in NNN-NNNN format, for example 100-0001.