Shape, check digit, accepted and refused examples and the API call for Corporate number in Japan. Every example on this page is run through the same validators as the free identifier validator, so a value shown as accepted is a value the validator accepts.
| Field | Value |
|---|---|
| Register | National Tax Agency |
| Shape | C N{12} |
| Check digit | Enforced. 13 digits; the first is the check digit over the 12-digit base: 9 minus (the sum of the base digits, weighted 1 and 2 alternately from the right, mod 9). |
| Worked example (accepted) | 1180301018771 |
| Normalised form | 1180301018771 |
| Also accepted as input | T1180301018771 |
| A one-character slip | 1180301018772 is refused |
| Regex (normalised form) | ^[1-9][0-9]{12}$ |
| API call | GET /companies/search?country=JP&company_number=1180301018771 |
| VAT number | The register data holds no VAT number for this identifier. |
A T in front and full-width digits are read; the bare 12-digit base is refused. Companies only; government bodies and associations are never served.
curl "https://api.prometiam.com/functions/v1/risk-api/companies/search?country=JP&company_number=1180301018771" \ -H "Authorization: Bearer YOUR_API_KEY"
Shape notation: N digit · L letter · X digit or letter · C check digit or character · {n} repeat n times.
A valid shape and check digit prove that a number is well-formed, not that a company holds it. Only a lookup in the register answers that.
Register data that the API serves for Japan carries this credit:
Source: National Tax Agency Corporate Number Publication Site (https://www.houjin-bangou.nta.go.jp/). Edited and processed by Prometiam; not a product of the National Tax Agency or the State.
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