Japanese tax research requires separating the statute from subordinate rules, tax forms, National Tax Agency guidance, local taxes, and treaty analysis. This guide links the tax-law articles currently available on this site and explains when to start with the Consumption Tax Act or the Corporate Tax Act. It is a research guide for foreign businesses and does not provide filing advice, treaty analysis, tax-rate modeling, or transaction-specific conclusions.
Start with the Tax Type
The first research step is to identify the tax type. Consumption tax and corporate tax use different taxable events, taxpayers, calculation structures, returns, and credits.
For Japanese consumption tax, read Consumption Tax Act: Scope, Credits, and Filing. That article explains Taxable Transfer, etc. of Assets, Taxable Purchases, Business Operators, Foreign Business Operators, Taxable Periods, Base Periods, non-taxable transactions, export exemption, small-business exemption, newly established corporation rules, tax base, tax rate, Input Tax Credit, simplified tax system, returns, payment, refunds, notifications, and Qualified Invoice Issuer registration.
For Japanese corporate tax, read Corporate Tax Act: Taxpayers, Income, and Returns. That article explains Domestic Corporations, Foreign Corporations, Public Corporations, Ordinary Corporations, Business Years, Domestic Source Income, Permanent Establishments, taxable income, gross profits, deductible expenses, donations, losses, rates, credits, interim returns, final returns, payment, refunds, and foreign-corporation rules.
Do not treat "tax in Japan" as one statute. A foreign company may need to check consumption tax, corporate tax, withholding tax, local taxes, registration taxes, customs duties, and treaty provisions, depending on the facts. This guide covers only the tax statutes already published on this site.
Consumption Tax Research Path
Use the Consumption Tax Act when the issue concerns Japanese consumption tax on domestic taxable transactions, imports, credits for purchases, invoice registration, returns, or refunds.
Start with Article 2 for definitions. Terms such as Business Operator, Foreign Business Operator, Transfer, etc. of Assets, Taxable Transfer, etc. of Assets, Taxable Purchase, Taxable Period, and Base Period determine the rest of the analysis. Then check Article 4 for the subject of taxation and Article 5 for the taxpayer. If the transaction may be non-taxable or export-exempt, check Article 6 and Article 7 before moving to calculation provisions.
For taxpayer status, check Article 9 on the small-business exemption and special rules such as Article 12-2 and Article 12-3 for newly established corporations and related entities. For calculation, check Article 28 on tax base, Article 29 on tax rate, Article 30 on Input Tax Credit, and Article 37 on the simplified tax system. For filing, check Articles 42, 45, 46, 48, 49, 52, and 57.
If the question concerns invoices, start with Article 57-2 on Qualified Invoice Issuer registration and Article 57-4 on qualified invoices. Practical form details, invoice descriptions, and registration procedures require subordinate rules and National Tax Agency materials beyond the overview article.
Corporate Tax Research Path
Use the Corporate Tax Act when the issue concerns which corporations are taxed, how taxable income is computed, and which return or payment rule applies.
Start with Article 2 for definitions. The distinction between Domestic Corporation and Foreign Corporation matters because the tax base and return rules differ. Article 4 states corporate-tax obligations for Domestic Corporations and specified Foreign Corporations. Article 5, Article 6, Article 6-2, Article 6-3, Article 6-4, Article 7, Article 8, and Article 9 identify taxable income categories, minimum-tax categories, and retirement pension reserve rules. Article 138 defines Domestic Source Income, and Article 141 categorizes Foreign Corporations for tax-base calculation.
For computation, Article 22 is the central provision. It states that income for each business year is the amount remaining after deducting deductible expenses from gross profits. It also defines gross profits and deductible expenses and ties calculation to generally accepted accounting standards unless otherwise provided. Specific articles then adjust that general rule, including Article 23 for certain dividends, Article 37 for donations, Article 55 for concealed or disguised expenses, and Article 57 for loss carryforwards.
For rate and filing structure, check Article 66 for domestic-corporation rates, Article 68 for income-tax credits, Article 69 for foreign-tax credits, Article 71 and Article 72 for interim returns, Article 74 for final returns, Article 76 and Article 77 for payment, and Article 78 and Article 79 for refunds. For Foreign Corporations, check Articles 143, 144-2, 144-4, 144-6, 144-8, 144-9, and 144-13.
Statutes, Forms, and Guidance
Tax statutes often state the legal structure while forms, filing details, and administrative explanations appear elsewhere. A reliable research trail keeps those layers separate.
The Act should be used for the taxpayer, taxable event, calculation basis, return obligation, credit, exemption, or refund rule. Cabinet Orders and ministry ordinances often provide thresholds, forms, documentation rules, and procedural detail. National Tax Agency materials often explain forms and administrative handling, but they should not be cited as if they were the Act itself.
When writing or reviewing an English tax explanation, ask four source questions. Which Act creates the tax or obligation? Which article defines the taxpayer or transaction? Which subordinate rule supplies the form or detail? Which official guidance explains administration? If the sentence cannot be tied to one of those sources, narrow it or omit it.
Foreign businesses should be especially careful with rates and dates. A rate statement, invoice-system statement, or filing-deadline statement can change through amendment, subordinate rules, or transitional provisions. Cite the article or official document directly and avoid relying on older secondary summaries.
What This Guide Does Not Cover
This guide currently links the published consumption-tax and corporate-tax articles on this site. It does not yet provide a separate Income Tax Act overview.
Income tax may still matter for foreign businesses, especially for withholding, directors, employees, royalties, interest, dividends, and nonresident payments. Those topics require separate coverage because the taxpayer, withholding agent, source rules, and treaty interaction differ from corporate-tax and consumption-tax analysis.
Local taxes are also outside this guide. Corporate enterprise tax, corporate inhabitant tax, local consumption tax, fixed asset tax, and other local taxes are governed by separate statutes and local rules. Customs duties and import consumption tax also require separate customs-law research.
Use this guide as a starting map. Once the tax type is identified, read the statute-specific article, then open the statute on elaws.jp, then check subordinate rules and official forms for the actual filing or documentation step.