What is a Japan Post Customer Code barcode?
The Japan Post Customer Code is a 4-state postal barcode used on mail in Japan. It encodes the 7-digit postal code followed by address numbers, such as block and house number, so mail can be sorted to the delivery point.
Letters in the address part are encoded using control characters, and the symbol has a fixed length with a check digit. Japan Post publishes the rules for turning an address into customer code data.
Use it on bulk mail that qualifies for Japan Post's barcode services. The generator encodes the data you enter and does not look up addresses.
What data can Japan Post Customer Code hold?
The postal code and address number data, using digits, uppercase letters and hyphens, for example 6540123789-A-K-Z.
Recommended size
Print at the size specified by Japan Post and keep a clear area around the barcode. Test-print before mailing in volume.
More Postal Codes barcodes
How to Create a Barcode in 3 Steps
Choose a barcode type
Select a category on the left (e.g. Linear Codes), then the exact type like Code-128.
Enter data & customise
Type your data — we check it live and add check digits. Adjust size, font and colors.
Download or print
Get PNG, JPG, SVG, PDF or EPS, or print a full sheet of labels in one click.
Why Use QRCodeChamp Barcode Generator
125+ barcode types
Linear, 2D, GS1, postal, healthcare and payment codes.
Live validation
Friendly errors with one-click fixes and automatic check digits.
Print-ready PDF
Exact mm sizes, label sheets (Avery, A4, 4×6 thermal).
Bulk barcodes
Paste a list or generate number sequences.
Choose the Type of Barcode You Need
Not sure which barcode to use? Start with what you need it for — we’ll pick the right type.
Frequently Asked Questions
The 7-digit postal code followed by the numeric parts of the address, such as block and house number, built following Japan Post's rules.
They are all 4-state postal barcodes, but each uses its own character encoding and address data for its country.
No. It encodes the characters you enter, so build the data according to Japan Post's specification.