Check the spec
Lengths and check-digit rules for this postal symbology are listed above.
Free tools · Logistics
Generate Japan Post Customer Code postage symbols.
Japan Post 4-state barcode for postal codes and addresses. Enter Postal/address data, e.g. 350110622-1A308 for Japan Post Customer Code below — lengths and check digits validate instantly in your browser before the symbol renders.
Postal barcode generator
Pick a post, type the data.
Runs locally in your browser. Nothing is uploaded; validation errors name the exact rule.
Style (module size, bar height, readable text)
Rendering symbol…
Specification
| Standards | Japan Post specifications |
|---|---|
| Character set | Digits, A–Z and hyphen. Digits/hyphens use 1 symbol unit; letters compact to 2. Maximum 20 symbol units. |
| Lengths | Postal/address data, e.g. 350110622-1A308 |
| Check digits | Check-digit rules enforced by the native engine; see input hint. |
| Quiet zone | Calm quiet zones on both sides; pure black on white for sorter readability. |
| Capacity | Digits, A–Z and hyphen. Digits/hyphens use 1 symbol unit; letters compact to 2. Maximum 20 symbol units. |
Usage
Japan Post Customer Code routes Asia-Pacific mail through automated sorters: print it on envelopes and parcels where Asia-Pacific carriers expect it.
- Japan Post Customer Code on envelopes for Asia-Pacific automated sorting
- Japan Post Customer Code on parcels with the example 350110622-1A308 as a starting point
- Japan Post Customer Code proofs exported as SVG for print-safe output
Shape
Pros
- Japan Post Customer Code is accepted by Asia-Pacific sorting automation.
- Lengths and check digits validate instantly with the exact rule named.
- SVG export stays sharp for envelopes and parcel labels.
- The symbol is read back locally before preview unlocks where a reader exists.
Cons
- Japan Post Customer Code is single-purpose — it carries postal data, not general text.
- Wrong lengths or missing check digits are rejected instead of printed.
- Low contrast or tight quiet zones fail high-speed sorters first.
- Screenshots prove encoding, not sorter-grade print quality.
Form requirements
- Enter Postal/address data, e.g. 350110622-1A308.
- Digits, A–Z and hyphen. Digits/hyphens use 1 symbol unit; letters compact to 2. Maximum 20 symbol units.
- Preview and downloads stay withheld until local verification passes where a reader exists.
Sources
- Japan Post customer code specifications (Japan Post)
Related formats
Keep exploring.
How it works
Three steps, all on your device.
The same engine that prints parcel labels worldwide, running in your browser.
Type the data
The on-device engine enforces the rest and appends check digits where the standard says so.
Verify, then print
The symbol is rasterized and read back locally before preview and downloads unlock.
Questions
Japan Post Customer Code Generator & Specs, answered.
If you manage servers by hand, see the engineering services behind this tools series.
What do I type for Japan Post Customer Code?
Digits, A–Z and hyphen. Digits/hyphens use 1 symbol unit; letters compact to 2. Maximum 20 symbol units. Try the example 350110622-1A308 first.
Does Japan Post Customer Code need a check digit?
Digits, A–Z and hyphen. Digits/hyphens use 1 symbol unit; letters compact to 2. Maximum 20 symbol units. The engine computes or verifies it and names the expected digit on mismatch.
Is my data uploaded anywhere?
No. Encoding and verification run entirely in your browser — the page makes no network requests with your data, stores nothing, and wipes the field after ten idle minutes.
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