日本 · 法人番号
Japanese Corporate Number Checker
Check a Japanese 法人番号 (Corporate Number) or invoice T-number against the National Tax Agency’s Corporate Number register — with the registered name and address.
What is a Japanese Corporate Number?
A Corporate Number (法人番号) is the public 13-digit number Japan’s National Tax Agency assigns to registered companies, government bodies and certain other organisations: a leading check digit and a 12-digit base. With T in front, a corporation’s Corporate Number is also its qualified invoice registration number — SoftBank Corp. is 9010401052465 and T9010401052465.
Japanese Corporate Number format
A leading check digit and a 12-digit base number.
(T-number only)
(1–9)
(registry number for companies)
Example: 9010401052465 (ソフトバンク株式会社, SoftBank Corp.). Invoice registration number: T9010401052465.
- 13 digits: The check digit comes first, not last. Our checker accepts the number with or without the invoice T prefix.
- Check digit: 9 − (weighted sum mod 9), as set by Ministry of Finance ordinance. The sample 1234567890123 fails it.
- Read the result: A valid result shows the registered company name. If no name comes back, treat the number as not found in the register.
- Not invoice status: The checker does not confirm qualified invoice registration — that is listed on a separate NTA site.
How to check a Japanese Corporate Number
- 1 Find the 法人番号 or T-number on the company’s website, invoice or receipt.
- 2 Enter it above, with or without T. The checker looks it up in the NTA Corporate Number register.
- 3 Compare the returned name and address with the business you are dealing with — and treat a result with no company name as not found.
- 4 Need the background on Japanese tax IDs? Read our Japan tax ID guide.
Frequently Asked Questions
Is the invoice T-number the same as the Corporate Number?
For a corporation, yes: the qualified invoice registration number is T plus its 13-digit Corporate Number — SoftBank Corp. is 9010401052465 and T9010401052465. For sole proprietors it is T plus a separate 13-digit number, never their My Number.
Does a Corporate Number mean the company is invoice-registered?
No. A T-number is issued only after the business applies to the tax office and is listed on the NTA’s Qualified Invoice Issuer Publication Site. Our checker looks up the Corporate Number register, not invoice registration.
What is the format of a Japanese Corporate Number?
13 digits: a leading check digit from 1 to 9, followed by a 12-digit base number. For a registered company the base is its commercial registry number (会社法人等番号).
How is the Corporate Number check digit calculated?
Number the 12 base digits from the right, multiply digits in odd positions by 1 and in even positions by 2, and add them up. The check digit is 9 minus the sum modulo 9 — so a remainder of 0 gives 9, not 0.
Do sole proprietors have a Corporate Number?
No. Corporate Numbers go to corporations and certain other organisations; sole proprietors and branches do not receive one. A sole proprietor who registers for the invoice system gets a T-number instead.
Can I publish or store a Corporate Number?
Yes. Unlike the 12-digit personal My Number, whose use is restricted, Corporate Numbers are public and there are no restrictions on using them.
Last reviewed: , against official sources.
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