Japan Business Day API

Endpoints (13 live)

• GET /v1/jpx/trading-day — Is the Tokyo Stock Exchange (JPX/TSE) open on a date? Returns closed reasons, next/previous trading day and the first/last trading days of the year (daihakkai/dainokai). (0.005 USDC on Base)
• GET /v1/is-business-day — Is a given date a business day in Japan? Returns weekday/holiday status, official holiday name (JA/EN) and next/previous business day. Source: Cabinet Office of Japan. (0.005 USDC on Base)
• GET /v1/jpx/record-date — Japanese equities dividend/shareholder-benefit schedule: from a record date (kenri kakutei-bi) returns the last cum-rights trading day and the ex-rights date under T+2 settlement, handling weekends and holidays. (0.01 USDC on Base)
• GET /v1/holidays — List all Japanese national holidays (JA/EN names) for a year, from official Cabinet Office data. (0.01 USDC on Base)
• GET /v1/bank-value-date — When will a bank transfer in Japan be credited? Given the submission time, returns the value date under standard processing: same day if before the bank cutoff (default 15:00 JST) on a bank business day, otherwise the next bank business day (skips weekends, national holidays, Dec 31 - Jan 3). (0.01 USDC on Base)
• GET /v1/add-business-days — Add or subtract N Japanese business days from a date (e.g. settlement date T+2, delivery ETA). Skips weekends and national holidays; optional bank calendar. (0.01 USDC on Base)
• GET /v1/payment-due-date — Japanese payment terms calculator (shimebi/shiharaibi): e.g. 'month-end close, paid end of next month', shifted to the previous/next business day when the due date is a weekend or Japanese holiday. Supports bank calendar (Dec 31 - Jan 3). (0.01 USDC on Base)
• GET /v1/jpx/sq — Nikkei 225 futures/options SQ (special quotation) day for a contract month: 2nd Friday, moved earlier if a non-trading day, plus the last trading day. (0.01 USDC on Base)
• GET /v1/koyomi/find — Find auspicious dates in Japan: list days in a range (up to 366 days) matching rokuyo (e.g. taian) and optional weekdays (e.g. sat,sun) - for scheduling weddings, moving, contract signing and ceremonies. (0.01 USDC on Base)
• GET /v1/koyomi — Japanese traditional calendar for a date: rokuyo (taian/butsumetsu... lucky days used for weddings, funerals, contracts), Japanese era (Reiwa) date, old lunisolar calendar date incl. leap months, 24 solar terms (sekki) and year eto. Verified against the National Astronomical Observatory of Japan. (0.005 USDC on Base)
• GET /v1/holidays — List all Japanese national holidays (JA/EN names) for a year, from official Cabinet Office data. (0.01 USDC on Base)
• GET /v1/add-business-days — Add or subtract N Japanese business days from a date (e.g. settlement date T+2, delivery ETA). Skips weekends and national holidays; optional bank calendar. (0.01 USDC on Base)
• GET /v1/payment-due-date — Japanese payment terms calculator (shimebi/shiharaibi): e.g. 'month-end close, paid end of next month', shifted to the previous/next business day when the due date is a weekend or Japanese holiday. Supports bank calendar (Dec 31 - Jan 3). (0.01 USDC on Base)