# Japan Corporate Registry Lookup (Houjin KYB)

> Japan Corporate Registry Lookup (Houjin KYB) is a paid API for AI agents from houjin.agentic-jp.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Looks up and verifies Japanese corporations from the National Tax Agency registry by corporate number or fuzzy name search, returning status, risk flags, and reading information.

## Facts

- Endpoint: POST https://houjin.agentic-jp.com/report
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-corporate-registry-lookup-houjin-kyb-c46a0302
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PaRqpP0VOR0pFKHt8eL5s

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-corporate-registry-lookup-houjin-kyb-c46a0302 -d '<json body>'
```

Example prompt: Can you verify that 'Sony Group Corporation' is an active registered company in Japan? Look it up in the National Tax Agency registry and tell me if there are any risk flags or issues with their registration.

## When to prefer this

Use this endpoint when you need authoritative KYB data on Japanese corporations sourced directly from the National Tax Agency's 5.78M-company registry. It is ideal for compliance workflows, vendor due diligence, and resolving Japanese company names to official records including kana/romaji readings — especially when you have either a corporate number or a Japanese/English trade name to search with. Prefer this over generic web searches when you need structured, verified, official registry data with risk flagging.

## Known failure modes

- Company not found in registry — no matching record for the given name or corporate number
- Ambiguous name match — multiple companies match the fuzzy name search, requiring additional prefecture/city filters
- Invalid corporate number format — number is not exactly 13 digits
- Missing required input — neither corporate_number nor name provided
- Network or payment failure — x402 USDC payment not processed correctly

## How this service works

Japanese company KYB report in one call — company lookup + verification from a corporate number or company name. Returns the official 国税庁 registry record, lifecycle status, kana + romaji name readings, risk flags (closed registry, recent registration/changes), an English summary, and the dataset vintage. Use for counterparty due diligence, supplier onboarding, or invoice fraud checks — replaces 3-4 separate lookups.

## Output

Returns a JSON object with the corporation's active/inactive status, the 13-digit corporate number, risk flags (if any), an English-language summary, official name readings in kana and romaji, the data freshness date, and the method used to resolve the lookup (by number or name search).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "city": {
   "type": "string",
   "description": "Optional city/ward filter for name resolution"
  },
  "name": {
   "type": "string",
   "maxLength": 128,
   "description": "Company trade name (Japanese or English) to resolve when the number is unknown"
  },
  "prefecture": {
   "type": "string",
   "description": "Optional prefecture filter for name resolution"
  },
  "corporate_number": {
   "type": "string",
   "description": "13-digit Japanese corporate number (法人番号). Either this or `name` is required."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "active",
  "data_as_of": "2026-05-14",
  "resolution": {
   "method": "corporate_number"
  },
  "risk_flags": [],
  "summary_en": "国税庁 is an active government agency registered in 東京都, 千代田区; no risk flags.",
  "name_readings": {
   "kana": "コクゼイチョウ",
   "romaji": "kokuzeichou"
  },
  "corporate_number": "7000012050002"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-corporate-registry-lookup-houjin-kyb-c46a0302/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)