{"uid":"cap_Tjp4_E5O_VJ1YsPHlGk__","slug":"mart402-japan-consumption-tax-calculator-5e6c3bbc","name":"Mart402 Japan Consumption Tax Calculator","description":"Japan consumption tax: per-rate invoice rounding (one rounding per rate), qualified invoice (T+13) field validation, simplified taxation, 20-percent special (taxable periods that include a day 2023-10-01..2026-09-30). $0.01/call.","url":"https://mart402.com/v1/jp-consumption-tax?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"mode":{"type":"string"},"taxable_period_end":{"type":"string"},"taxable_period_start":{"type":"string"},"taxable_sales_excl_yen":{"type":"number"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_C-UAAMkjjbTob4Zh2ybwx","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes Japan consumption tax with per-rate invoice rounding, qualified invoice (T+13) field validation, simplified taxation, and the 20% special rule for taxable periods overlapping 2023-10-01 through 2026-09-30","exampleAgentPrompt":"Calculate Japan consumption tax for my taxable period from April 1 2024 to March 31 2025, with taxable sales excluding tax of ¥12,500,000 — use the qualified invoice mode and apply per-rate rounding.","exampleUseCases":[{"title":"Qualified invoice tax compliance check","prompt":"I'm issuing a Japanese qualified invoice (registered number T+13) for taxable sales of ¥3,200,000 excluding tax, for the period October 1 2023 to September 30 2024. Can you compute the consumption tax with per-rate rounding and validate the qualified invoice fields?"},{"title":"Simplified taxation for small business","prompt":"We're a small Japanese business using the simplified taxation method. Our taxable period is April 1 2024 to March 31 2025, and taxable sales excluding tax are ¥45,000,000 yen. Can you calculate our consumption tax liability?"},{"title":"20% special rule period check","prompt":"My company's taxable period runs from July 1 2025 to June 30 2026 — does the 20-percent special JCT rule apply? Please calculate our consumption tax for taxable sales of ¥8,750,000 excluding tax."}],"resultDescription":"Returns computed Japan consumption tax amounts with per-rate rounding applied (one rounding per rate), qualified invoice (T+13) field validation results, simplified taxation figures where applicable, and an indicator of whether the 20% special rule applies for taxable periods overlapping October 1 2023 through September 30 2026.","failureModes":["Invalid or missing taxable_period_start or taxable_period_end dates returns a validation error","Negative or non-numeric taxable_sales_excl_yen causes a schema validation failure","Unknown or unsupported mode value returns an error indicating valid modes","Taxable period entirely outside the special-rule window returns result without 20% special rule fields","Malformed request body returns HTTP 400 with field-level error details"],"whenToPreferThis":"Choose this endpoint when you need Japan-specific consumption tax computation that handles the complexity of the 2023 qualified invoice system (invoice registration number T+13), per-rate rounding rules required by the new invoice regime, simplified taxation method for eligible small businesses, and the transitional 20% special rule for periods touching October 2023 to September 2026. Prefer this over generic tax or accounting APIs that lack Japan JCT-specific rounding and qualified invoice validation logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:47:39.794Z","isFirstParty":false,"canonicalSlug":"mart402-japan-consumption-tax-calculator-5e6c3bbc"}