# Houjin Corporate Number Lookup (Japan NTA Registry)

> 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.

## Facts

- Endpoint: GET https://houjin.agentic-jp.com/corporation/:number?utm_source=zero.xyz
- Price: $0.002000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/houjin-agentic-jp-com-906ffb72
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NfJSGzEgs9dmjey9Hvr5E

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability houjin-agentic-jp-com-906ffb72
```

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.

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/houjin-agentic-jp-com-906ffb72/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from houjin.agentic-jp.com](https://www.zero.xyz/host/houjin.agentic-jp.com/llms.txt)