Chapter I Calculation of Income in Each Class (Articles 21-3 to 29)
The law as Ministerial Order Partially Amending the Regulation for Enforcement of the Income Tax Act (Ministry of Finance Order No. 18 of 2025) leaves it, with the words it changes marked.
The main text is read a page at a time: a chapter to a page, and a long chapter in runs of articles. The whole main text, and the supplementary provisions and appended tables this amendment changes. Those it leaves untouched are on the page for the text in force.
Section 3 Calculation of Necessary Expenses, etc.第三節 必要経費等の計算
Subsection 1 Exclusion of Household-Related Expenses, etc. from Necessary Expenses, etc.第一款 家事関連費等の必要経費不算入等
Article 21-3第二十一条の三
Article 21-3, paragraph (1)
The places specified by Ministry of Finance Order as prescribed in Article 45, paragraph (3), item (i), (b) (Exclusion of Household-Related Expenses from Necessary Expenses) of the Act are the location of the place of domicile or place of residence of the Resident referred to in (b) of that item, or of the office or place of business relating to the business that the Resident carries on, the place where business that generates miscellaneous income is conducted, or any other place equivalent thereto.
Subsection 1-2 Valuation of Inventory第一款の二 棚卸資産の評価
Article 22第二十二条
Matters to Be Stated in a Written Application for Approval of a Special Method of Valuation(特別な評価の方法の承認申請書の記載事項)
Article 22, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 99-2, paragraph (2) (Special Methods of Valuing Inventory) of the Order are the name and domicile (or residence, if there is no domicile in Japan; the same applies hereinafter in this Subsection and Subsection 2) of the person who submits the written application prescribed in that paragraph, and any other matters for reference.
Matters to Be Stated in a Written Application for Change of the Method of Valuing Inventory(棚卸資産の評価の方法の変更申請書の記載事項)
Article 23, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 101, paragraph (2) (Procedures for Changing the Method of Valuing Inventory) of the Order are the following matters.
the name and domicile of the person who submits the written application prescribed in Article 101, paragraph (2) of the Order;
令第百一条第二項に規定する申請書を提出する者の氏名及び住所
Article 23, paragraph (1), item (ii)
the type of business for which the method of valuation is to be changed, and the classification of Inventory such as goods or products (excluding by-products and scrap), semi-finished goods, work in process (including partially completed construction), principal raw materials, auxiliary raw materials and other Inventory;
the method of valuation currently in use and the date on which that method of valuation was adopted;
現によつている評価の方法及びその評価の方法を採用した年月日
Article 23, paragraph (1), item (iv)
the new method of valuation to be adopted;
採用しようとする新たな評価の方法
Article 23, paragraph (1), item (v)
any other matters for reference.
その他参考となるべき事項
Subsection 1-3 Valuation of Securities第一款の三 有価証券の評価
Article 23-2第二十三条の二
Acquisition Price of Shares, etc. Acquired Through a Merger(合併により取得した株式等の取得価額)
Article 23-2, paragraph (1)
The relationship specified by Ministry of Finance Order as prescribed in Article 112, paragraph (1) (Acquisition Price of Shares, etc. Acquired Through a Merger) of the Order is, in the case where, immediately before a merger, there is, between the merging corporation prescribed in Article 2, item (xii) (Definitions) of the Corporation Tax Act pertaining to that merger and a corporation other than that merging corporation, a full controlling interest held by that corporation (meaning the full controlling interest prescribed in item (xii)-7-6 of that Article; the same applies hereinafter in this Article and the following Article), that full controlling interest.
Acquisition Price of Shares, etc. Acquired Through a Split-Type Company Split(分割型分割により取得した株式等の取得価額)
Article 23-3, paragraph (1)
The relationship specified by Ministry of Finance Order as prescribed in Article 113, paragraph (1) (Acquisition Price of Shares, etc. Acquired Through a Split-Type Company Split) of the Order is, in the case where, immediately before a split-type company split prescribed in Article 2, item (xii)-9 (Definitions) of the Corporation Tax Act, there is, between the succeeding corporation in a company split prescribed in item (xii)-3 of that Article pertaining to that split-type company split and a corporation other than that succeeding corporation, a full controlling interest held by that corporation, that full controlling interest.
A transaction in which Securities prescribed in Article 119 (Acquisition Price of Shares or Public and Corporate Bonds Through Margin Transactions, etc.) of the Order are bought and sold before those Securities are issued, and which is specified by Ministry of Finance Order, is a when-issued transaction prescribed in Article 1, paragraph (2) (Definitions) of the Cabinet Office Order on Transactions Prescribed in Article 161-2 of the Financial Instruments and Exchange Act and Their Margin (Ministry of Finance Order No. 75 of 1953).
Subsection 2 Depreciation of Depreciable Assets第二款 減価償却資産の償却
Article 24第二十四条
Matters to Be Stated in a Written Application for Approval of a Special Depreciation Method(特別な償却方法の承認申請書の記載事項)
Article 24, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 120-3, paragraph (2) (Special Methods of Depreciation of Depreciable Assets) of the Order are the following matters.
the name and domicile of the person who submits the written application prescribed in Article 120-3, paragraph (2) of the Order;
令第百二十条の三第二項に規定する申請書を提出する者の氏名及び住所
Article 24, paragraph (1), item (ii)
which of the depreciation methods listed in (a) or (b) of each item of Article 132, paragraph (1) (Special Provisions on Depreciation Allowance for Depreciable Assets, etc. Put into Use for Business in the Middle of the Year) of the Order the depreciation method that is intended to be adopted is similar to;
The replacement assets specified by Ministry of Finance Order as prescribed in Article 121, paragraph (3) (Meaning of Replacement Assets) of the Order are the following assets.
令第百二十一条第三項(取替資産の意義)に規定する財務省令で定める取替資産は、次に掲げる資産とする。
Article 24-2, paragraph (1), item (i)
among structures belonging to railway facilities or tramway facilities: rails and their accessories, sleepers, switches, bonds, signals, communication lines, signal lines, electric lighting and power lines, power transmission and distribution lines, feeder lines, trolley lines, third rails, and wire supports (excluding steel poles, steel towers, concrete poles and concrete towers);
among structures belonging to power transmission facilities: wooden poles, insulators, power transmission lines, ground wires and attached telephone lines;
送電設備に属する構築物のうち、木柱、がい子、送電線、地線及び添架電話線
Article 24-2, paragraph (1), item (iii)
among structures belonging to power distribution facilities: wooden poles, power distribution lines, service lines and attached telephone lines;
配電設備に属する構築物のうち、木柱、配電線、引込線及び添架電話線
Article 24-2, paragraph (1), item (iv)
among machinery and equipment belonging to power distribution facilities for the electric utility business: meters, pole transformers, protective switching devices, power capacitors and indoor wiring;
among machinery and equipment belonging to facilities for the production of gas or coke and facilities for the supply of gas: cast iron gas conduits (limited to those with a diameter of 20.32 centimeters or less), steel gas conduits and gas meters for consumers.
Matters to Be Stated in a Written Application for Approval for Adoption of the Replacement Method(取替法を採用する場合の承認申請書の記載事項)
Article 25, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 121, paragraph (4) (Special Provisions on the Method of Depreciation of Replacement Assets) of the Order are the following matters.
the name and domicile of the person who submits the written application prescribed in Article 121, paragraph (4) of the Order;
令第百二十一条第四項に規定する申請書を提出する者の氏名及び住所
Article 25, paragraph (1), item (ii)
the quantity, the total amount of the acquisition price and the total amount of the value after depreciation, for each type of Depreciable Asset to which the person intends to have Article 121, paragraph (1) of the Order applied, expected on January 1 of the year in which the person intends to adopt the replacement method prescribed in Article 121, paragraph (2) of the Order (or, if the person has started a business that generates business income in the middle of the year, on the date of the start; the same applies in Article 27 (Matters to Be Stated in a Written Application for Certification of a Special Depreciation Rate));
Matters to Be Stated in a Written Notification for Adoption of the Old Lease-Period Straight-Line Method(旧リース期間定額法を採用する場合の届出書の記載事項)
Article 25-2, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 121-2, paragraph (2) (Special Provisions on the Method of Depreciation of Lease-Rented Assets) of the Order are the following matters.
the name and domicile of the person who submits the written notification prescribed in Article 121-2, paragraph (2) of the Order;
令第百二十一条の二第二項に規定する届出書を提出をする者の氏名及び住所
Article 25-2, paragraph (1), item (ii)
the total amount of the revised acquisition price prescribed in Article 121-2, paragraph (3) of the Order, for each type of asset (meaning the type of asset prescribed in Article 121-2, paragraph (2) of the Order) for which the person intends to adopt the old lease-period straight-line method prescribed in Article 121-2, paragraph (1) of the Order;
Scope of Depreciable Assets to Which a Special Depreciation Rate May Apply(特別な償却率によることができる減価償却資産の範囲)
Article 26, paragraph (1)
The things specified by Ministry of Finance Order as prescribed in Article 122, paragraph (1) (Method of Depreciation Using a Special Depreciation Rate) of the Order are the following Depreciable Assets.
motion picture films (limited to those shown in sequence at two or more permanent theaters);
映画用フィルム(二以上の常設館において順次上映されるものに限る。)
Article 26, paragraph (1), item (iii)
rolls for rolling nonferrous metals (excluding rolls for rolling electric wire);
非鉄金属圧延用ロール(電線圧延用ロールを除く。)
Article 26, paragraph (1), item (iv)
dies and other tools used for the production of products whose models, etc. are changed in a short period and whose production period is fixed in advance on the basis of a production plan, which are extremely difficult to use for the production of products other than those products;
fishing nets, metals commonly used for printing type, and things similar to the assets listed in the preceding items.
漁網、活字に常用されている金属及び前各号に掲げる資産に類するもの
Article 27第二十七条
Matters to Be Stated in a Written Application for Certification of a Special Depreciation Rate(特別な償却率の認定申請書の記載事項)
Article 27, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 122, paragraph (2) (Method of Depreciation Using a Special Depreciation Rate) of the Order are the following matters.
the name and domicile of the person who submits the written application prescribed in Article 122, paragraph (2) of the Order;
令第百二十二条第二項に規定する申請書を提出する者の氏名及び住所
Article 27, paragraph (1), item (ii)
the quantity, the total amount of the acquisition price and the total amount of the value after depreciation, for each type of Depreciable Asset to which the person intends to have Article 122, paragraph (1) of the Order applied, as of January 1 of the year that includes the date on which the written application referred to in the preceding item is submitted;
the depreciation rate for which the person intends to obtain the certification referred to in Article 122, paragraph (1) of the Order;
令第百二十二条第一項の認定を受けようとする償却率
Article 27, paragraph (1), item (iv)
any other matters for reference.
その他参考となるべき事項
Article 28第二十八条
Unit for Selection of the Method of Depreciation(償却の方法の選定の単位)
Article 28, paragraph (1)
The categories specified by Ministry of Finance Order as prescribed in Article 123, paragraph (1) (Selection of the Method of Depreciation of Depreciable Assets) of the Order are the categories of types specified in each of the following items according to the category of Depreciable Asset listed in those items.
among Depreciable Assets other than machinery and equipment, those to which Appended Table I (Table of Useful Lives of Tangible Depreciable Assets Other Than Machinery and Equipment) of the Ministerial Order on the Useful Life, etc. of Depreciable Assets (Ministry of Finance Order No. 15 of 1965; hereinafter referred to as the "Useful Life Order" in this Article through Article 33 (Depreciation Allowance for Depreciable Assets of the Same Type, etc.)) applies: the types prescribed in that table;
among machinery and equipment, those to which Appended Table II (Table of Useful Lives of Machinery and Equipment) of the Useful Life Order applies: the types of equipment prescribed in that table;
among Depreciable Assets used for wastewater treatment or smoke and soot treatment prescribed in Article 2, item (i) (Useful Lives of Special Depreciable Assets) of the Useful Life Order, those to which Appended Table V (Table of Useful Lives of Depreciable Assets for Pollution Prevention) of the Useful Life Order applies: the types prescribed in that table;
among Depreciable Assets used for development research prescribed in Article 2, item (ii) of the Useful Life Order, those to which Appended Table VI (Table of Useful Lives of Depreciable Assets for Development Research) of the Useful Life Order applies: the types prescribed in that table;
mine shafts, mining rights listed in Article 6, item (viii), (a) (Scope of Depreciable Assets) of the Order (excluding those listed in the following item), and storage rights: the types of equipment prescribed in Appended Table II of the Useful Life Order that relate to those mine shafts, mining rights and storage rights;
test-drilling rights: the type of equipment prescribed in Appended Table II of the Useful Life Order that relates to those test-drilling rights.
試掘権 当該試掘権に係る耐用年数省令別表第二に規定する設備の種類
Article 29第二十九条
Matters to Be Stated in a Written Application for Change of the Method of Depreciation of Depreciable Assets(減価償却資産の償却の方法の変更申請書の記載事項)
Article 29, paragraph (1)
The matters specified by Ministry of Finance Order as prescribed in Article 124, paragraph (2) (Procedures for Changing the Method of Depreciation of Depreciable Assets) of the Order are the following matters.
the name and domicile of the person who submits the written application prescribed in Article 124, paragraph (2) of the Order;
令第百二十四条第二項に規定する申請書を提出する者の氏名及び住所
Article 29, paragraph (1), item (ii)
the classification of the type and structure or use, detail, or type of equipment of the Depreciable Asset whose method of depreciation is to be changed (in the case where a Resident who has two or more places of business or ships and has not selected a method of depreciation for each place of business or ship intends to select a method of depreciation for each place of business or ship, those classifications for each place of business or ship);
the method of depreciation currently in use and the date on which that method of depreciation was adopted;
現によつている償却の方法及びその償却の方法を採用した年月日
Article 29, paragraph (1), item (iv)
the new method of depreciation to be adopted;
採用しようとする新たな償却の方法
Article 29, paragraph (1), item (v)
any other matters for reference.
その他参考となるべき事項
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Coming into force施行
The day a law or an amendment starts to apply. It is often months or years after promulgation, so that people have time to prepare. The Ministry of Justice's English usually says a law "comes into force" or "comes into effect", and sometimes calls the day its "enforcement date". Its "enforcement" more often means the word's other sense, carrying a law out, as in an Order for Enforcement (施行令), the Cabinet Order (政令) that sets out the details for carrying out an Act.