# 所得税法 / Income Tax Act — 第二十条 (Supplementary Provisions, Article 20) This is the Markdown twin of https://japanlaw.org/en/income-tax-act/suppl-3401-33/art-20. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp. - Law: 所得税法 (Income Tax Act), 昭和四十年法律第三十三号 - English title "Income Tax Act": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第二十条 (Supplementary Provisions, Article 20)（青色申告に関する経過規定） — address `suppl-3401-33/art-20` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/en/income-tax-act/suppl-3401-33/art-20 - e-Gov law ID: 340AC0000000033 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page. - Every provision below carries its address and its URL on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第二十条（青色申告に関する経過規定） — Transitional Provisions Concerning Blue Returns caption: machine translation, not official suppl-3401-33/art-20 · https://japanlaw.org/en/income-tax-act/suppl-3401-33/art-20 **第一項** 新法第百四十八条第一項（青色申告者の帳簿書類）（新法第百六十六条（非居住者に対する準用）において準用する場合を含む。）の規定は、昭和四十一年以後の年における新法第百四十三条（青色申告）に規定する業務に係る同項に規定する帳簿書類について適用し、昭和四十年以前の年における当該業務に係る当該帳簿書類については、なお従前の例による。 suppl-3401-33/art-20/par-1 · https://japanlaw.org/en/income-tax-act/suppl-3401-33/art-20/par-1 Article 148, paragraph (1) (Books and Documents of Blue Return Taxpayers) (including as applied mutatis mutandis pursuant to Article 166 (Application Mutatis Mutandis to Nonresidents) of the New Act) of the New Act applies to books and documents prescribed in that paragraph relating to business prescribed in Article 143 (Blue Returns) of the New Act for 1966 and subsequent years, and the provisions then in force continue to govern such books and documents relating to such business for 1965 and prior years. machine translation, not official --- ## Cites - suppl-3401-33/art-20/par-1: 新法第百四十八条第一項 → 所得税法 第百四十八条第一項 (Article 148, paragraph (1)), art-148/par-1 — https://japanlaw.org/en/income-tax-act/art-148/par-1 - suppl-3401-33/art-20/par-1: 新法第百六十六条 → 所得税法 第百六十六条 (Article 166), art-166 — https://japanlaw.org/en/income-tax-act/art-166 - suppl-3401-33/art-20/par-1: 新法第百四十三条 → 所得税法 第百四十三条 (Article 143), art-143 — https://japanlaw.org/en/income-tax-act/art-143 ## Cited by 1 provision cites this one. No official source publishes this direction. - 所得税法 附則第三十三条第一項（政令への委任） — https://japanlaw.org/en/income-tax-act/suppl-3401-33/art-33/par-1 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 所得税法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/340AC0000000033/20261001_507AC0000000070), retrieved 2026-10-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Income Tax Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3120/tb), retrieved 2026-09-18 - claude-opus-5[1m] — Machine translation, batch income-tax-act-20260918T180319-045, translated 2026-09-18 - This site's parser, version 225 — 所得税法 — structure, counts, cross-references and defined terms, computed 2026-10-05