{"uid":"cap_kOpONHYZs2np7zSBGDLbF","slug":"mart402-japan-business-days-statutory-deadlines-c5406168","name":"Mart402 Japan Business Days & Statutory Deadlines","description":"Japan business days + statutory deadlines: holidays (equinox + substitute), business-day arithmetic, tax filing deadlines with holiday shift, wareki conversion. 1980-2099. $0.003/call.","url":"https://mart402.com/v1/jp-business-days?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"kind":{"type":"string"},"mode":{"type":"string"},"base_date":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_k-RNuZ8VCUJCgUbprZ2J1","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates Japanese business days, public holidays (including equinox and substitute holidays), business-day arithmetic, tax filing deadlines with holiday shifts, and wareki (Japanese era) conversions for dates between 1980 and 2099.","exampleAgentPrompt":"Is March 21, 2025 a Japanese business day, and if not, what is the next business day? Also tell me what the tax filing deadline would be if it's originally due on that date.","exampleUseCases":[{"title":"Tax deadline shift for Japan filing","prompt":"Our corporate tax return is due on September 23, 2025 in Japan — is that a public holiday, and if so, what is the actual filing deadline after the holiday shift?"},{"title":"Business-day countdown for contract terms","prompt":"A supplier contract requires payment 15 business days after the invoice date of January 6, 2026 in Japan — what is the exact due date accounting for Japanese public holidays?"},{"title":"Wareki date conversion for legal documents","prompt":"Convert February 11, 2026 to its wareki (Japanese era) equivalent so I can fill in a Japanese legal document correctly."}],"resultDescription":"Returns whether a date is a Japanese business day or holiday (including equinox and substitute holidays), the result of business-day arithmetic (e.g. next/previous business day, N-day offset), tax filing deadlines adjusted for holiday shifts, and wareki-format date representations. Coverage spans 1980–2099.","failureModes":["Date outside 1980–2099 range returns an error or out-of-range response","Invalid date format (non-ISO string) causes a validation error","Unsupported 'kind' or 'mode' enum value returns a bad-request error","Missing required fields (e.g. base_date) return a 400-class error","Network or payment authorization failure (x402 protocol) prevents call execution"],"whenToPreferThis":"Choose this endpoint when you need authoritative Japanese business calendar logic — especially equinox holidays (whose dates vary by year), substitute holidays, statutory tax deadline shifts, or wareki conversions — rather than relying on a generic calendar library that may not have current Japanese holiday rules or era names. Covers 1980–2099 with statutory accuracy.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:46:38.914Z","isFirstParty":false,"canonicalSlug":"mart402-japan-business-days-statutory-deadlines-c5406168"}