> ## Documentation Index
> Fetch the complete documentation index at: https://docs.coverbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Japan

> What Coverbase asks a supplier in Japan for, and which of those rules block a submission.

[User guides](/user-guides/overview) / [Supplier countries](/user-guides/supplier-countries/overview)

A supplier whose bank account is held in Japan sees the fields below. The country is chosen on the form, and changing it changes the fields, so a supplier is never asked for a detail their country does not use.

## Bank details

| Field                                     | Requirement | Format                                         | Notes                                                            |
| ----------------------------------------- | ----------- | ---------------------------------------------- | ---------------------------------------------------------------- |
| Bank name                                 | Optional    | up to 60 characters                            |                                                                  |
| Bank code                                 | Required    | 4 characters, digits only                      | 4 digits.                                                        |
| Branch code                               | Required    | 3 characters, digits only                      | 3 digits.                                                        |
| Account holder name (half-width katakana) | Required    | up to 48 characters                            | Half-width katakana, e.g. ｶﾌﾞｼｷｶﾞｲｼｬ.                            |
| Bank name (Japanese)                      | Suggested   | up to 40 characters                            | Full-width characters only.                                      |
| Branch name (Japanese)                    | Suggested   | up to 40 characters                            | Full-width characters only.                                      |
| Account number                            | Required    | up to 8 characters, digits only                |                                                                  |
| Check digit                               | Optional    | no length limit, digits only                   |                                                                  |
| Deposit type                              | Required    | no length limit, one of: futsu, toza, chochiku | Futsu (ordinary), Toza (current) or Chochiku (savings).          |
| SWIFT/BIC                                 | Optional    | 8 to 11 characters, letters and digits         | 8 or 11 characters, e.g. BOFAUS3N. Needed for a payment by wire. |

### IBAN

An IBAN is optional for Japan. It is up to 34 characters and is checked against the ISO 7064 MOD-97 algorithm, which catches a mistyped or transposed digit before the details reach your finance system.

## Tax and company registrations

| Registration     | Requirement | Format                                                            | Notes      |
| ---------------- | ----------- | ----------------------------------------------------------------- | ---------- |
| Corporate Number | Required    | 13 characters, digits only, Japanese corporate number check digit | 13 digits. |

After a registration is saved, Coverbase checks it against Japan's National Tax Agency in the background. That check never blocks the supplier: it annotates the record once it completes, and a reviewer can retry it.

## Country rules

* Postal codes are checked against the national format. A postal code that does not match produces a warning, not a rejection.

## Where these rules come from

Oracle Fusion Cash Management 26c JP validations; NTA corporate number spec.

The rules on this page are confirmed against a primary source, so they are enforced strictly.

Configuration version `2026.09.1`. Your organization can override any of these rules for its own suppliers.

## Related

<CardGroup cols={2}>
  <Card title="Supplier countries" icon="globe" href="/user-guides/supplier-countries/overview">
    Every country Coverbase validates, side by side.
  </Card>

  <Card title="Supplier information guide" icon="building-columns" href="/user-guides/supplier-information">
    How these details are collected, reviewed, and handed to your finance system.
  </Card>
</CardGroup>