# Japan Corporate-Number API — Batch Lookup

> Japan Corporate-Number API — Batch Lookup is a paid API for AI agents from houjin.agentic-jp.com, paid per call via x402, $0.0032/call, status unknown (last checked 2026-09-16).

Batch-look up and verify Japanese corporations by corporate number or name using the National Tax Agency's 5.78M-company registry, paid per call via USDC x402.

## Facts

- Endpoint: POST https://houjin.agentic-jp.com/batch
- Price: $0.0032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-corporate-number-api-batch-lookup-95f7a769
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2ebQ4VRLczQHNxsOLLiDc

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-number-api-batch-lookup-95f7a769 -d '<json body>'
```

Example prompt: Can you look up these two Japanese companies — corporate number 7000012050002 and the company called '国立印刷局' — and confirm whether they are active, plus give me their registered addresses and English names if available?

## When to prefer this

Use this endpoint when you need to verify or enrich data about Japanese legal entities using their 13-digit NTA corporate number, or when you need fuzzy name search across all 5.78M registered Japanese corporations. Ideal for KYB workflows, supplier due diligence, or compliance checks involving Japan-domiciled entities. Prefer over generic web scraping when you need structured, authoritative registry data. The batch endpoint is best when you have multiple entities to verify in one call.

## Known failure modes

- CORPORATION_NOT_FOUND — the corporate number does not exist in the NTA registry; returns success:false with error code
- Invalid or malformed corporate number format — request validation error
- Network or upstream NTA registry unavailability — service error
- Payment failure via x402 — call not processed if USDC payment is rejected

## How this service works

Look up and verify all 5.78M Japanese corporations from the National Tax Agency registry. KYB, fuzzy name search. Pay per call with USDC via x402 — no API key.

## Output

A JSON object with a count of results and an array of per-query results. Each result includes the corporate number, official Japanese name, English name, full registered address (prefecture, city, street, postal code), corporation type, active/closed status, registration and update dates, close date and cause if applicable, and a successor corporate number if merged or dissolved. Failed lookups return a structured error code and message.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "items": {
   "type": "array",
   "description": "Corporate numbers to look up in one call (max 50). Each item has an `id` (echoed back) and a 13-digit `corporate_number`."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 2,
  "results": [
   {
    "id": "a",
    "data": {
     "city": "港区",
     "name": "国立印刷局",
     "status": "active",
     "street": "虎ノ門二丁目2番5号",
     "name_en": null,
     "corp_kind": "101",
     "name_kana": null,
     "address_en": null,
     "close_date": null,
     "prefecture": "東京都",
     "change_date": "2015-10-05",
     "close_cause": null,
     "postal_code": "1058445",
     "update_date": "2018-04-02",
     "address_full": "東京都港区虎ノ門二丁目2番5号",
     "process_kind": "01",
     "assignment_date": "2015-10-05",
     "corp_kind_label": "National government agency",
     "prefecture_code": "13",
     "corporate_number": "7000012050002",
     "close_cause_label": null,
     "successor_corporate_number": null
    },
    "success": true
   },
   {
    "id": "b",
    "error": {
     "code": "CORPORATION_NOT_FOUND",
     "message": "No corporation with that number"
    },
    "success": false
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-corporate-number-api-batch-lookup-95f7a769/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)