# 所得税法 / Income Tax Act — 第四十八条 (Article 48) This is the Markdown twin of https://japanlaw.org/ja/income-tax-act/art-48. 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: 第四十八条 (Article 48)（有価証券の譲渡原価等の計算及びその評価の方法） — address `art-48` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/income-tax-act/art-48 - 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. --- ### 第四十八条（有価証券の譲渡原価等の計算及びその評価の方法） — (Calculation of Costs of Transferred Securities and Valuation Methods) caption: Ministry of Justice translation — Japanese Law Translation Database System art-48 · https://japanlaw.org/ja/income-tax-act/art-48 **第一項** 居住者の有価証券につき第三十七条第一項（必要経費）の規定によりその者の事業所得の金額の計算上必要経費に算入する金額を算定する場合におけるその算定の基礎となるその年十二月三十一日において有する有価証券の価額は、その者が有価証券について選定した評価の方法により評価した金額（評価の方法を選定しなかつた場合又は選定した評価の方法により評価しなかつた場合には、評価の方法のうち政令で定める方法により評価した金額）とする。 art-48/par-1 · https://japanlaw.org/ja/income-tax-act/art-48/par-1 In the calculation of the amount that, pursuant to the provisions of Article 37, paragraph (1) (Necessary Expenses), is included, in association with a Security that a Resident holds, in the necessary expenses that are used to calculate the Resident's business income, the value of a Security held by the Resident on December 31 of the relevant year which is used as the basis for that calculation is the amount of money assessed based on the valuation method that the Resident has selected for Securities (or based on the valuation method prescribed by Cabinet Order, if the Resident does not select a valuation method or if the value of the Security is not assessed based on the selected valuation method). Ministry of Justice translation — Japanese Law Translation Database System **第二項** 前項の選定をすることができる評価の方法の種類、その選定の手続その他有価証券の評価に関し必要な事項は、政令で定める。 art-48/par-2 · https://japanlaw.org/ja/income-tax-act/art-48/par-2 Cabinet Order provides for the types of the selectable valuation methods referred to in the preceding paragraph, the way of selecting a valuation method, and other necessary particulars concerning the valuation of Securities. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 居住者が二回以上にわたつて取得した同一銘柄の有価証券につき第三十七条第一項の規定によりその者の雑所得の金額の計算上必要経費に算入する金額又は第三十八条第一項（譲渡所得の金額の計算上控除する取得費）の規定によりその者の譲渡所得の金額の計算上取得費に算入する金額は、政令で定めるところにより、それぞれの取得に要した金額を基礎として第一項の規定に準じて評価した金額とする。 art-48/par-3 · https://japanlaw.org/ja/income-tax-act/art-48/par-3 The amount that, pursuant to the provisions of Article 37, paragraph (1), is included, in association with a Security of the same class that the Resident acquires on two or more occasions, in the necessary expenses that are used to calculate the amount of a Resident's miscellaneous income, or that, pursuant to the provisions of Article 38, paragraph (1) (Acquisition Costs Deducted to Calculate Capital Gains) is included, in association with such a Security, in the acquisition costs that are used to calculate the Resident's capital gains, is the value assessed pursuant to Cabinet Order and in accordance with the provisions of paragraph (1), based on the amount needed to acquire the Security on each occasion. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-48/par-1: 第三十七条第一項 → 所得税法 第三十七条第一項 (Article 37, paragraph (1)), art-37/par-1 — https://japanlaw.org/ja/income-tax-act/art-37/par-1 - art-48/par-2: 前項 → 所得税法 第四十八条第一項 (Article 48, paragraph (1)), art-48/par-1 — https://japanlaw.org/ja/income-tax-act/art-48/par-1 - art-48/par-3: 第三十七条第一項 → 所得税法 第三十七条第一項 (Article 37, paragraph (1)), art-37/par-1 — https://japanlaw.org/ja/income-tax-act/art-37/par-1 - art-48/par-3: 第三十八条第一項 → 所得税法 第三十八条第一項 (Article 38, paragraph (1)), art-38/par-1 — https://japanlaw.org/ja/income-tax-act/art-38/par-1 - art-48/par-3: 第一項 → 所得税法 第四十八条第一項 (Article 48, paragraph (1)), art-48/par-1 — https://japanlaw.org/ja/income-tax-act/art-48/par-1 ## Cited by 3 provisions cite this one. No official source publishes this direction. - 所得税法 第四十八条第二項（有価証券の譲渡原価等の計算及びその評価の方法） — https://japanlaw.org/ja/income-tax-act/art-48/par-2 - 所得税法 第四十八条第三項（有価証券の譲渡原価等の計算及びその評価の方法） — https://japanlaw.org/ja/income-tax-act/art-48/par-3 - 所得税法施行規則 第四十七条第三項第六号（確定所得申告書の記載事項） — https://japanlaw.org/ja/income-tax-act-enforcement-regulation/art-47/par-3/item-6 (e-Gov law ID 340M50000040011) --- ## 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 - This site's parser, version 224 — 所得税法 — structure, counts, cross-references and defined terms, computed 2026-10-05