# Japan Houjin Number Lookup API

> Japan Houjin Number Lookup API is a paid API for AI agents from api.kasanegi.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Looks up a Japanese corporate registration number (hōjin bangō) and returns clean structured company data from Japanese government public records.

## Facts

- Endpoint: GET https://api.kasanegi.com/v1/local/houjin-number/lookup
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-houjin-number-lookup-api-bffb08ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FBegu3-yNK6iJ7Wfgfhcv

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 japan-houjin-number-lookup-api-bffb08ed
```

Example prompt: Can you look up the Japanese company registered under hōjin bangō 1234567890123 and tell me the official company name, address, and registration status?

## When to prefer this

Choose this endpoint when you need structured, clean JSON data for a Japanese corporation identified by its official 13-digit hōjin bangō (corporate number), especially when you want to avoid scraping the NTA's own website. Ideal for KYC enrichment, vendor verification, or any workflow that starts with a known Japanese corporate registration number.

## Known failure modes

- Invalid or malformed corporate number (not 13 digits) returns a 400 error
- Corporate number not found in NTA registry returns a 404 or empty result
- Payment not included or insufficient USDC triggers x402 payment required response
- Upstream NTA data source temporarily unavailable returns 503
- Rate limiting or quota exceeded returns 429

## How this service works

Stop scraping Japanese government and public-data sites. Call clean Japan payroll, company, and grant APIs over one host. Preview free; one public marketplace listing covers all current products; x402 direct is available for agent-native buyers.

## Output

Returns a JSON object containing structured company information sourced from the Japanese National Tax Agency's corporate number registry, including the official registered company name, address, corporation type, and current registration status for the given 13-digit hōjin bangō.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "mimeType": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-houjin-number-lookup-api-bffb08ed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.kasanegi.com](https://www.zero.xyz/host/api.kasanegi.com/llms.txt)