Add N Japanese business days to a date, skipping weekends and public holidays, and return the resulting date. Useful for computing due dates and delivery dates in Japan. Covers years 2026-2027. Cost: $0.002 USDC per request.

Count Japanese business days in a date range, inclusive of both endpoints, excluding weekends and public holidays. Useful for SLA, lead-time and settlement-date calculations in Japan. Covers years 2026-2027. Cost: $0.002 USDC per request.

Check whether a given date is a Japanese public holiday, a weekend, or a business day. Returns the official holiday name in Japanese (e.g. 憲法記念日, 振替休日) when the date is a holiday. Substitute holidays (振替休日) are included. Covers years 2026-2027. Cost: $0.001 USDC per request.

List every Japanese public holiday in a given year, with each date and its official Japanese name. Useful for building a yearly calendar in one call instead of checking dates individually. Covers years 2026-2027. Cost: $0.002 USDC per request.