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Took effect 1 October 2026, since replaced

Income Tax Act

所得税法(しょとくぜいほう)

Amended by

Act Partially Amending the Income Tax Act, etc.

所得税法等の一部を改正する法律

The whole text as amended, on e-Gov

The same amending law also changes

  • 1 April 2025 — Consumption Tax Act
  • 1 April 2025 — Corporation Tax Act
  • 1 April 2025 — This law
  • 1 April 2025 — Act on the Use of Numbers to Identify a Specific Individual in Administrative Procedures
  • 1 April 2025 — National Tax Collection Act
  • 1 April 2025 — Act on General Rules for National Taxes
  • 1 April 2025 — Act on Special Measures for Securing the Financial Resources Necessary to Implement Measures for Reconstruction following the Great East Japan Earthquake
  • 1 April 2025 — Act on Special Measures Concerning Taxation
  • 1 May 2025 — Act on Special Measures Concerning Taxation
  • 1 October 2025 — Act on Special Measures Concerning Taxation
  • 21 November 2025 — Act on Special Measures Concerning Taxation
  • 1 December 2025 — This law
  • 1 December 2025 — Act on Special Measures Concerning Taxation
  • 18 December 2025 — Corporation Tax Act
  • 18 December 2025 — This law
  • 1 January 2026 — This law
  • 1 January 2026 — Act on Special Measures Concerning Taxation
  • 1 April 2026 — Corporation Tax Act
  • 1 April 2026 — This law
  • 1 April 2026 — National Tax Collection Act
  • 1 April 2026 — Act on General Rules for National Taxes
  • 1 April 2026 — Act on Special Measures for Securing the Financial Resources Necessary to Implement Measures for Reconstruction following the Great East Japan Earthquake
  • 1 April 2026 — Act on Special Measures Concerning Taxation
  • 1 October 2026 — Consumption Tax Act
  • 1 October 2026 — Corporation Tax Act
  • 1 November 2026 — Consumption Tax Act
  • 1 November 2026 — Act on General Rules for National Taxes
  • 1 November 2026 — Act on Special Measures Concerning Taxation
  • 1 January 2027 — Consumption Tax Act
  • 1 January 2027 — This law
  • 1 January 2027 — Act on Special Measures Concerning Taxation

3 provisions changed

Each provision the amendment changes, as it will read: the words it adds are underlined, and a bar marks where it removes words. “Show removed words” strikes those through in place; “Before and after” sets the two wordings side by side. A provision that only moves to another number says the number it had. The Japanese is the law; the icon beside each English column says whose English it is.

How the changes are shown

Underlined: words the amendment adds. A bar: where it removes words.Underlined: words the amendment adds. Struck through: the words it removes.Underlined: words the amendment adds. Struck through: the words it removes.

Article 120 · (Filing an Income Tax Return)第百二十条(確定所得申告)

Read it in the amended law
  • ChangedArticle 120, paragraph (4), item (ii)

    a document specified by Ministry of Finance Order as a document by which an insurer prescribed in Article 7, paragraph (2) (Definitions) of the Act on Assurance of Medical Care for Elderly People, a wide-area union for latter-stage elderly medical care prescribed in Article 48 (Establishment of Wide-Area Unions) of that Act, the Social Insurance Medical Fee Payment FundOrganization for Medical Information Infrastructure and Medical Fee Review and Payment, or a Federation of National Health Insurance Associations prescribed in Article 45, paragraph (5) (Medical Fees for Insurance Medical Institutions) of the National Health Insurance Act gives notice of the amount of medical expenses paid by the Resident, which states the amount of medical expenses claimed and related details.

    高齢者の医療の確保に関する法律第七条第二項(定義)に規定する保険者若しくは同法第四十八条(広域連合の設立)に規定する後期高齢者医療広域連合又は社会保険診療報酬支払基金医療情報基盤・診療報酬審査支払機構若しくは国民健康保険法第四十五条第五項(保険医療機関等の診療報酬)に規定する国民健康保険団体連合会の当該居住者が支払つた医療費の額を通知する書類として財務省令で定める書類で、控除適用医療費の額等の記載があるもの

Article 204 · Obligation to Withhold Taxes第二百四条(源泉徴収義務)

Read it in the amended law
  • ChangedArticle 204, paragraph (1), item (iii)

    medical fees paid pursuant to the provisions of the Act on Social Insurance Medical Fee Payment Fund the Organization for Medical Information Infrastructure and Medical Fee Review and Payment (Act No. 129 of 1948) (including the expenses required for securing medical care in the initial phase of an epidemic prescribed in Article 36-9, paragraph (1) of the Act on the Prevention of Infectious Diseases and Medical Care for Patients with Infectious Diseases (Act No. 114 of 1998), paid by the payment fundorganization prescribed in paragraph (2) (Measures to Secure Medical Care in the Initial Phase of an Epidemic) of that Article that has been entrusted by a prefectural governor pursuant to the provisions of that paragraph with the affairs concerning the measures to secure medical care in the initial phase of an epidemic prescribed in that paragraph);

    社会保険診療報酬支払基金医療情報基盤・診療報酬審査支払機構法(昭和二十三年法律第百二十九号)の規定により支払われる診療報酬(感染症の予防及び感染症の患者に対する医療に関する法律(平成十年法律第百十四号)第三十六条の九第二項(流行初期医療確保措置)の規定により都道府県知事から同項に規定する流行初期医療確保措置に係る事務を委託された同項に規定する支払基金基盤機構から支払われる同条第一項に規定する流行初期医療の確保に要する費用を含む。)

Appended Table 1別表第一

Read it in the amended law
  • ChangedAppended Table 1Every wording
    NameGoverning Act
    Consignor protection fundsProtection FundsCommodity Derivatives Transaction Act
    Organization for Medical Information Infrastructure and Medical Fee Review and PaymentAct on the Organization for Medical Information Infrastructure and Medical Fee Review and Payment
    Medical care corporations (limited to social medical care corporations as prescribed in Article 42-2, paragraph (1) (Social Medical Care Corporations) of the Medical Care Act (Act No. 205 of 1948))Medical Care Act
    (6 rows this amendment leaves as they were are not shown)
    Corporate pension fundsDefined-Benefit Corporate Pension Act
    Pension Fund AssociationAssociations
    Hazardous Materials Safety Techniques AssociationAssociationsFire Service Act (Act No. 186 of 1948)
    Administrative scriveners' associationsScrivener's AssociationCertified Administrative Procedures Legal Specialist Act (Act No. 4 of 1951)
    Fishing industry mutual aid associationsIndustry Mutual Aid AssociationsAct on Compensation of Fishery Disaster (Act No. 158 of 1964)
    Federations of fishing industry mutual aid associationsFishing Industry Mutual Aid Associations
    Fishing industry credit guarantee fund associationsIndustry Credit Guarantee Fund AssociationsAct on Loan Security for Small and Medium Sized Fishery Industry (Act No. 346 of 1952)
    Fishing vessel insurance associationsVessel Insurance AssociationsAct on Compensation of Damages Related to Fishing Vessels (Act No. 28 of 1952)
    Japan Financial Literacy and Education CorporationAct on the Provision of Financial Services and the Development of the Accessible Environment Thereto (Act No. 101 of 2000)
    Asset-building funds for wage earnersAsset-Building Funds for Wage EarnersWorkers' Property Accumulation Promotion Act (Act No. 92 of 1971)
    Light Motor Vehicle Inspection OrganizationRoad Transport Vehicle Act (Act No. 185 of 1951)
    Health insurance societiesInsurance SocietiesHealth Insurance Act
    National Federation of Health Insurance Societies
    (5 rows this amendment leaves as they were are not shown)
    Incorporated public interest foundationsAct on General Incorporated Associations and General Incorporated Foundations (Act No. 48 of 2006) and Act on Authorization of Public Interest Incorporated Associations and Public Interest Incorporated Foundations (Act No. 49 of 2006)
    Incorporated public interest associations
    Offenders rehabilitation corporationscorporationOffender Rehabilitation Services Act (Act No. 86 of 1995)
    Port authoritiesPort and Harbour Act
    (3 rows this amendment leaves as they were are not shown)
    National Health Insurance SocietiesNational Health Insurance Act
    FederationsFederation of National Health Insurance Associations
    National Pension FundsNational Pension Act
    National Pension Fund Association
    (3 rows this amendment leaves as they were are not shown)
    Japan Safe Driving CenterJapan Safe Driving Center Act (Act No. 57 of 1975)
    Judicial scriveners' associationsScriveners' AssociationsJudicial Scriveners Act (Act No. 197 of 1950)
    Social welfare corporationsSocial Welfare Act (Act No. 45 of 1951)
    Social Insurance Medical Fee Payment FundAct on Social Insurance Medical Fee Payment Fund
    Labor and social security attorney's associationsSocial Security Attorney's AssociationsAct on Public Consultants on Social and Labour Insurance (Act No. 89 of 1968)
    Religious corporationsReligious Corporations Act (Act No. 126 of 1951)
    Residential area development associationsAct on Special Measures concerning Promotion of Supply of Houses and Housing Lands in Urban Districts (Act No. 67 of 1975)
    Sake brewers' associationsAct on Securing of Liquor Tax and on Liquor Business Associations (Act No. 7 of 1953)
    Japan Sake Brewers' Association
    Federations of sake brewers' associationsFederation of Sake Brewers' Associations
    Liquor merchants' associations
    All Japan Liquor Merchants' Association
    Federations of liquor merchants' associationsFederation of Liquor Merchants' Associations
    Commercial associationsCommerce and Industry Association Act (Act No. 89 of 1960)
    Chambers of commerceChambers of CommerceChambers of Commerce and Industry Act (Act No. 143 of 1953)
    Central Federation of Societies of Commerce and IndustryCommerce and Industry Association Act
    Commercial and industrial associations (limited to associations that do not require members to make contributions)Act on the Organization of Small and Medium-sized Enterprise Association (Act No. 185 of 1957)
    FederationsFederation of commercial and industrial associations (limited to associations that do not require members to make contributions)
    Spent Fuel Reprocessing and Decommissioning Promotion OrganizationAct on the Implementation of Reprocessing, etc. of Spent Fuel and the Promotion of Decommissioning in Nuclear Power Generation (Act No. 48 of 2005)
    (3 rows this amendment leaves as they were are not shown)
    Vocational training corporationsVocational Abilities Development Promotion Act
    Credit guarantee corporationsGuarantee CorporationsCredit Guarantee Association Act (Act No. 196 of 1953)
    Flood prevention associationsPrevention AssociationsFlood Prevention Association Act (Act No. 50 of 1908)
    Federations of flood prevention associationsFederation of Flood Prevention Associations
    Environmental health industry associationsHealth Industry Associations (limited to associations that do not require members to make contributions)Act on Coordination and Improvement of Environmental Health Industry (Act No. 164 of 1957)
    Federations of environmental health industry associationsFederation of Environmental Health Industry Associations (limited to associations that do not require members to make contributions)
    Certified public tax accountants' associationsPublic Tax Accountants' AssociationsCertified Public Tax Accountant Act (Act No. 237 of 1951)
    Coal Mining Pension FundCoal Mining Pension Fund Act
    (7 rows this amendment leaves as they were are not shown)
    National Association of RacingHorse Racing Act (Act No. 158 of 1948)
    Local governmentsRegional governmentsLocal Autonomy Act (Act No. 67 of 1947)
    Japan Finance Organization for MunicipalitiesAct on the Japan Finance Organization for Municipalities (Act No. 64 of 2007)
    (9 rows this amendment leaves as they were are not shown)
    Japan Industrial Safety and Health AssociationIndustrial Accident Prevention Organization Act (Act No. 118 of 1964)
    Federations of small business associationsFederation of Small Business AssociationsSmall and Medium-Sized Enterprise Cooperatives Act (Act No. 181 of 1949)
    Investor protection fundsProtection FundsFinancial Instruments and Exchange Act
    Incorporated administrative agencies (limited to agencies designated by the Minister of Finance as those in which the national or local government owns all of the stated capital or capital contributions; those that make no distribution of profits, distribution of surplus or other similar distribution of monies to any person other than the national or a local government; or those equivalent thereto)Act on General Rules for Incorporated Administrative Agencies (Act No. 103 of 1999) and the individually governing Acts prescribed in Article 1, paragraph (1) (Purpose, etc.) of that Act
    Public land development corporationsAct on Advancement of Expansion of Public Lands (Act No. 66 of 1972)
    Land improvement districtsLand Improvement Act (Act No. 195 of 1949)
    Unified land improvement districts
    Federations of land improvement associationsFederation of Land Improvement Associations
    Associations of land and house investigatorsLand and Buildings Investigator Act (Act No. 228 of 1950)
    Land readjustment associationsLand Readjustment Act (Act No. 119 of 1954)
    Prefectural vocational ability development associationsVocational Ability Development AssociationsVocational Abilities Development Promotion Act
    Japan Federation of Administrative Scriveners' AssociationsCertified Administrative Procedures Legal Specialist Act
    Japan Workers' Housing AssociationAct on Japan Workers' Housing Association (Act No. 133 of 1966)
    Japan Sewage Works AgencyAct on the Japan SewerageJapan Sewage Works Agency Act (Act No. 41 of 1972)
    Japanese Institute of Certified Public AccountantsCertified Public Accountants Act
    (16 rows this amendment leaves as they were are not shown)
    Agricultural mutual relief associationsAgricultural Insurance Act (Act No. 185 of 1947)
    Federations of agricultural mutual relief associationsFederation of Agricultural Mutual Relief Associations
    Federations of agricultural cooperativesFederation of Agricultural Cooperatives (limited to federationscooperatives that have established hospitals or clinics that are public medical institutionsas prescribed in Article 31 (Definition of Public Medical Institutions) of the Medical Care Act and that are designated by the Minister of Finance as those meeting the requirements prescribed by Cabinet Order)Agricultural Co-operatives Act
    Agriculture credit guarantee fund associationsCredit Guarantee Fund AssociationAgricultural Credit Guarantee Insurance Act (Act No. 204 of 1961)
    Agricultural and Fishery Co-operative Savings Insurance CorporationAgricultural and Fishery Cooperatives Savings Insurance Act (Act No. 53 of 1973)
    Fukushima Institute for Research, Education and InnovationAct on Special Measures for the Reconstruction and Revitalization of Fukushima (Act No. 25 of 2012)
    Partnerships for debt settlementAct on Partnership for Debt Settlement of Farmers, etc. (Act No. 21 of 1933)
    Bar associationsAttorneys Act
    Insurance policyholders' protection corporationsPolicyholders' Protection CorporationsInsurance Business Act
    Maritime pilots' associationsPilotage Act
    (3 rows this amendment leaves as they were are not shown)
    Labor unions (limited to unions that are corporations)Labor Union Act (Act No. 174 of 1949)
    Industrial safety and health associationsSafety and Health AssociationIndustrial Accident Prevention Organization Act
    名称根拠法
    委託者保護基金商品先物取引法
    医療情報基盤・診療報酬審査支払機構医療情報基盤・診療報酬審査支払機構法
    医療法人(医療法(昭和二十三年法律第二百五号)第四十二条の二第一項(社会医療法人)に規定する社会医療法人に限る。)医療法
    (40 rows this amendment leaves as they were are not shown)
    社会福祉法人社会福祉法(昭和二十六年法律第四十五号)
    社会保険診療報酬支払基金社会保険診療報酬支払基金法
    社会保険労務士会社会保険労務士法(昭和四十三年法律第八十九号)
    (90 rows this amendment leaves as they were are not shown)

    Act No. 70 of 2025 changes it again, on . 3 more amendments change it after that.