Japan Business Calendar
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.
Japanese public data, published as pay-per-call APIs you can call without API keys or contracts. Payment uses x402 (HTTP 402 + PAYMENT-SIGNATURE), and only successful (2xx) responses are charged. 4xx / 5xx responses are not charged.
Send a plain GET first and you get a 402 that carries the price and the payee. Resend the same request with a signed payment header and the data is returned. Step-by-step instructions, parameters and examples for each endpoint are on each source's page.
Machine-readable listings are at /.well-known/x402 (x402 discovery) and /openapi.json (OpenAPI 3.1); a summary for agents is at /llms.txt.
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.