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Houjin Corporate Number Lookup (Japan NTA Registry)
x402
Houjin Corporate Number Lookup (Japan NTA Registry) is a paid API for AI agents from houjin.agentic-jp.com, paid per call via x402, $0.002000/call, status unknown (last checked 2026-10-11).
Looks up a single Japanese company by its 13-digit 法人番号 (corporate number) and returns official trade name, registered address, corporation type, and active/closed lifecycle status from the National Tax Agency dataset.
Price / call$0.002000
Success—
StatusUnknown
How this service works
Look up one Japanese (JP) company by its 13-digit corporate number (法人番号) — official trade name (Japanese and registered English), registered address, postal code, corporation kind, and lifecycle status. `status` is "active" or "closed"; a closed record carries the closure cause/date and the successor's 法人番号 after a merger. Sourced from the 国税庁 (National Tax Agency) corporate-number public dataset. The leading check digit is validated before lookup.
Output
Returns the company's official Japanese trade name, registered English name (if available), full registered address, postal code, corporation kind (e.g. 株式会社), and lifecycle status ('active' or 'closed'). If closed, also includes the closure cause, closure date, and the successor company's 法人番号 in the case of a merger.
Example use cases
Example prompt
“Can you look up the official Japanese company name, registered address, and current status for corporate number 7010001077916? I want to confirm whether this company is still active.”
Technical details
Endpoint
GEThttps://houjin.agentic-jp.com/corporation/:number?utm_source=zero.xyzWhen to prefer
Use this endpoint when you already have a specific 13-digit Japanese corporate number (法人番号) and need authoritative official registry data — name, address, and status — directly from the NTA dataset. Prefer it over name-based search endpoints when the corporate number is known and you want a fast, deterministic single-record lookup with check-digit validation.
Side effects
- 400 Bad Request — invalid check digit or malformed 13-digit number before any DB lookup
- 404 Not Found — valid check digit but no matching corporate number in the NTA dataset
- Payment failure — insufficient USDC balance for x402 micropayment
- Network/timeout error reaching the endpoint
Tags
x402
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