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Japan Business Calendar – Is Business Day
x402
Japan Business Calendar – Is Business Day is a paid API for AI agents from torii-gateway-production.ichis-lab.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Checks whether a given date is a Japanese business day, accounting for national holidays from the Cabinet Office official CSV.
Price / call$0.01
Success—
StatusUnknown
How this service works
Tell whether a given date is a Japanese business day. Japanese national holidays and business-day calculations derived from the Cabinet Office official CSV. Returns holidays for a given year, plus business-day arithmetic used by invoicing, logistics and HR systems in Japan.
Output
Returns a boolean or structured response indicating whether the queried date is a Japanese business day, along with any relevant holiday name if the date is a national holiday. Dates outside the range covered by the Cabinet Office CSV return a 404 and are not charged.
Example use cases
Invoice due date validation for Japan
“We're generating invoices for our Japanese clients and the payment due date falls on 2024-11-04. Is that actually a business day in Japan, or do we need to push it to the next working day?”
Logistics shipment scheduling
“We have a shipment scheduled to arrive at our Tokyo warehouse on 2025-02-11. Can you check if that's a business day in Japan so we know if staff will be available to receive it?”
HR payroll processing date check
“Our Japan payroll is supposed to go out on 2024-09-16. Can you confirm that's a valid business day in Japan before we submit the run?”
Technical details
Endpoint
GEThttps://torii-gateway-production.ichis-lab.workers.dev/v1/jp-biz-calendar/is-business-day?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need authoritative Japanese national holiday data sourced from the official Cabinet Office CSV for business-day logic in invoicing, payroll, logistics, or HR systems operating in Japan. Prefer it over hardcoded holiday lists or generic calendar libraries that may miss Japan-specific substitution holidays or recently added observances.
Side effects
- Date outside supported year range → 404 Not Found, no charge
- Invalid date format (not YYYY-MM-DD) → 400 Bad Request
- Network/worker timeout → 5xx error
- Weekends with no holiday data may require caller to also check day-of-week separately
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"date": "2026-01-05",
"is_business_day": true
},
"meta": {
"stale": false,
"source_id": "jp-biz-calendar",
"terms_url": "https://www.cao.go.jp/notice/rule.html",
"fetched_at": "2026-09-21T03:00:00.000Z",
"license_id": "PDL-1.0",
"attribution": "出典:内閣府ウェブサイト(https://www8.cao.go.jp/chosei/shukujitsu/gaiyou.html)を加工して作成",
"source_name": "内閣府「国民の祝日について」",
"freshness_class": "static"
}
}
}Tags
x402
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