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Japan Company Enrichment by Houjin Number (kasanegi.com)
x402
Japan Company Enrichment by Houjin Number (kasanegi.com) 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 and enriches Japanese company data using a houjin (corporate registration) number, returning structured public-data details about the company.
Price / call$0.01
Success—
StatusUnknown
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 structured JSON with enriched company details sourced from the Japanese houjin public registry, including corporate name (Japanese/romaji), houjin number, registered address, prefecture, and other available public registration metadata for matching companies.
Example use cases
Verify supplier identity before payment
“I need to verify a supplier's legal name and registered address in Japan before we process their invoice. Can you look up their company details using the name 'Sony Group Corporation' and confirm their official houjin registration status?”
Automated KYC checks for partners
“We're onboarding a new business partner in Japan. Can you retrieve the official corporate registration data for 'SoftBank Group Corp' including their registered address and prefecture, and flag any discrepancies from what they provided?”
Due diligence research for acquisitions
“We're evaluating a potential acquisition target in Osaka. Can you search for companies matching 'Panasonic' filtered to that prefecture and return their official houjin numbers, legal names in Japanese, and full registration details to support our due diligence?”
Technical details
Endpoint
GEThttps://api.kasanegi.com/v1/enrich/company-by-houjin-numberWhen to prefer
Use this endpoint when you need clean, structured Japanese corporate registration data without scraping government sites. Ideal when you have a company name (Japanese or romaji) and optionally a prefecture, and need to resolve it to an official houjin number and enriched company profile. Prefer this over manual scraping of the NTA registry or similar sources when building automated Japan-focused business intelligence, due diligence, or KYC workflows.
Side effects
- Company name not found in the houjin registry — returns empty results or 404
- Invalid or malformed houjin number — returns 400 validation error
- Prefecture filter too narrow — returns zero candidates
- Limit parameter out of range (below 1 or above 50) — returns 422 validation error
- Rate limit or payment failure (x402 payment not attached) — returns 402 Payment Required
- Japanese government data source temporarily unavailable — returns 503
Output
Schema · Response
{
"type": "json",
"mimeType": "application/json"
}Tags
x402
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