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Kaisha Japan Company Registry — Corporate Events Feed
x402
Kaisha Japan Company Registry — Corporate Events Feed is a paid API for AI agents from kaisha-api.hp-vladic.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns a paginated feed of recent Japanese company registry events (new incorporations, renames, closures, mergers, relocations) filtered by type, entity kind, prefecture, and date range
Price / call$0.01
Success—
StatusUnknown
How this service works
Official-data lookups for Japanese companies, priced per call via x402 (USDC on Base & Solana). Includes the only Japan qualified-invoice (適格請求書) registration-number verification on x402 — checked against the National Tax Agency dataset. Also: resolve company names / 13-digit corporate numbers to registry records, and compute Japanese business days & national holidays. No API keys — pay per request with x402.
Output
A JSON object containing the event type queried, total count, date range covered, a data-through date reflecting the latest NTA dataset update, and an array of matching events — each with the 13-digit corporate number, company name in Japanese, event description in Japanese and English, entity kind (ja/en), event date, assignment date, and address (prefecture, city, postcode).
Example use cases
Weekly new-incorporations digest for Tokyo
“Pull the last 7 days of newly registered companies in 東京都 from Japan's registry — give me up to 50 results so I can review this week's new incorporations.”
Monitor recent business closures in Osaka
“I want to see all companies that have closed or been dissolved in 大阪府 over the past 30 days — can you fetch that from Japan's corporate events feed?”
Track GK and KK mergers nationwide
“Get me a list of all merger events (kind codes 301 and 305) across all prefectures for the past 14 days from Japan's company registry, up to 200 results.”
Technical details
Endpoint
GEThttps://kaisha-api.hp-vladic.workers.dev/companies/eventsWhen to prefer
Choose this endpoint when you need a real-time feed of Japanese corporate registry events — new incorporations, closures, mergers, relocations, or renames — filterable by prefecture, entity type, and date range, without needing a corporate number or company name upfront. Prefer this over the name/number lookup endpoints when doing market monitoring, lead generation from new incorporations, compliance screening for entity changes, or building alerts on registry activity. It is the only x402-payable corporate events feed sourced directly from NTA data, requiring no API key setup.
Side effects
- Payment not received / x402 challenge not completed — request blocked before data is returned
- Invalid date format for from/to parameters — malformed query
- days parameter out of 1-60 range — rejected with validation error
- Invalid kind code supplied — no matching entity type returns empty results
- Prefecture string not matching NTA canonical names — filter returns zero results
- NTA dataset temporarily stale — dataThrough may lag real-time by 1-2 days
- Offset beyond available results — returns empty events array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"type": "new",
"count": 1,
"range": {
"to": "2026-07-17",
"from": "2026-07-11"
},
"events": [
{
"kind": {
"en": "Kabushiki Kaisha (stock company)",
"ja": "株式会社"
},
"name": "株式会社サンプル",
"event": {
"en": "newly registered",
"ja": "新設"
},
"address": {
"city": "渋谷区",
"postCode": "1500001",
"prefecture": "東京都"
},
"eventDate": "2026-07-17",
"assignmentDate": "2026-07-16",
"corporateNumber": "1010001234567"
}
],
"dataThrough": "2026-07-17"
}
}Tags
x402
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