Decode one
Scan or paste a barcode and see every part of it.
Make one
Generate a valid barcode from fields.
Where you’ll see it
- Business mail in Japan, printed to qualify for barcoded mail discounts.
Anatomy
Each bar is in one of four states:
The postal code and address number together are always 20 characters. Letters in the address are encoded with a control character followed by a digit, so each letter uses two of the 20 positions.
Japan Post publishes detailed rules for extracting the address number from a written address.
Check digit
The check digit makes the total of all 20 characters’ values a multiple of 19, after each character is replaced by its check value.Variants and related types
- Royal Mail 4-State and KIX: other 4-state address barcodes.
Scanning it in your app
Specification
- Japan Post postal code and barcode manual (Japanese): how to extract the address number.