add_japan_national_working_days

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Use this when you need a deterministic Japan statutory national-holiday date offset in 2026-2027. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you need company, school, bank, exchange or prefectural closure semantics. What it computes: Adds or subtracts dates using the pinned Japan statutory national-holiday schedule and weekend baseline. Example user requests: Add five Japan national working days after 2027-03-19. Inputs: start_date (date); working_days (integer). Complete JSON argument examples: {"start_date":"2027-03-19","working_days":1} Outputs: start_date, result_date, working_days_added, calendar_days_elapsed, national_holidays_skipped, territory, territory_name, day_type, holiday_names, holiday_kinds, holiday_legal_bases, weekend_days, calendar_scope, rest_day_policy, calendar_profile, dataset_version, sources. Formula: move one day at a time; decrement remaining only when Japan national status.is_working_day=true Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/japan-national-add-working-days with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/everyday/japan-national-add-working-days.md