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Act on Special Measures Concerning Taxation

租税特別措置法(そぜいとくべつそちほう)

Section 4 Timber Income and Capital Gains (Articles 37-2 to 37-4)

The law as Act Partially Amending the Income Tax Act, etc. (Act No. 12 of 2026) 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.

Article 37-2第三十七条の二

Request for Reassessment, Amended Return, etc. in the Case of Replacement of Specified Business Assets(特定の事業用資産の買換えの場合の更正の請求、修正申告等)
Article 37-2, paragraph (1)

A person who has received the application of the provisions of paragraph (1) of the preceding Article must, in the case where the person does not use the replacement asset for the business of the individual located within the area prescribed in the right-hand column of the respective items of the table in that paragraph within one year from the date of acquisition of the replacement asset, or ceases to use it for that business, file an amended return form for income tax for the year that includes the date of the transfer referred to in that paragraph within four months from the date on which the person comes to fall under any of these circumstances, and pay the amount of tax payable upon the filing of that return by that due date.

前条第一項の規定の適用を受けた者は、買換資産の取得をした日から一年以内に、当該買換資産を同項の表の各号の下欄に規定する地域内にある当該個人の事業の用に供しない場合又は供しなくなつた場合には、これらの事情に該当することとなつた日から四月以内に同項の譲渡をした日の属する年分の所得税についての修正申告書を提出し、かつ、当該期限内に当該申告書の提出により納付すべき税額を納付しなければならない。

Article 37-2, paragraph (2)

A person who has received the application of the provisions of paragraph (1) of the preceding Article as applied mutatis mutandis pursuant to paragraph (4) of that Article, in the case where the person falls under either of the following items, may, where the person falls under item (i) and the amount has become excessive, make a request for reassessment of income tax for the year that includes the date of the transfer referred to in paragraph (4) of that Article within four months from the date of acquisition of the replacement asset, and must, where the person falls under item (i) and a shortfall has arisen or where the person falls under item (ii), file an amended return form for income tax for the year that includes the date of the transfer referred to in that paragraph within four months from the date of acquisition of the replacement asset or from the date on which the circumstances falling under that item arose, and pay the amount of tax payable upon the filing of that return by that due date:

前条第四項において準用する同条第一項の規定の適用を受けた者は、次の各号のいずれかに該当する場合には、第一号に該当する場合で過大となつたときにあつては、当該買換資産の取得をした日から四月以内に同条第四項の譲渡をした日の属する年分の所得税についての更正の請求をすることができるものとし、同号に該当する場合で不足額を生ずることとなつたとき、又は第二号に該当するときにあつては、当該買換資産の取得をした日又は同号に該当する事情が生じた日から四月以内に同項の譲渡をした日の属する年分の所得税についての修正申告書を提出し、かつ、当該期限内に当該申告書の提出により納付すべき税額を納付しなければならないものとする。

Article 37-2, paragraph (2), item (i)

where the person has acquired an asset listed in the right-hand column of the respective items of the table in paragraph (1) of the preceding Article and there is an excess or shortfall in its acquisition price relative to the estimated amount of the acquisition price prescribed in paragraph (1) of that Article as applied mutatis mutandis pursuant to paragraph (4) of that Article, or where there is an excess or shortfall in the amount of the portion deemed to have been transferred as prescribed in paragraph (1) of that Article because the area of the replacement asset has come to differ from the area referred to in paragraph (4) of that Article, because the classification of the replacement asset (limited to one pertaining to item (iii) of that table; hereinafter the same applies in this item) among the areas listed in the items of paragraph (10) of that Article has come to differ from the classification among the areas listed in those items of the asset that the person expected to acquire and use for business as referred to in paragraph (4) of that Article, or because the determination as to whether the replacement asset falls under the principal office assets prescribed in paragraph (10) of that Article has come to differ from that determination for the asset that the person expected to acquire and use for business as referred to in paragraph (4) of that Article;

前条第一項の表の各号の下欄に掲げる資産の取得をした場合において、その取得価額が同条第四項において準用する同条第一項に規定する取得価額の見積額に対して過不足額があるとき、又はその買換資産の地域が同条第四項の地域と異なることとなつたこと、その買換資産(同表の第三号に係るものに限る。以下この号において同じ。)の同条第十項各号に掲げる地域の区分が、同条第四項の取得をし、事業の用に供する見込みであつた資産の当該各号に掲げる地域の区分と異なることとなつたこと若しくはその買換資産が同条第十項に規定する主たる事務所資産に該当するかどうかの判定が、同条第四項の取得をし、事業の用に供する見込みであつた資産の当該判定と異なることとなつたことにより同条第一項に規定する譲渡があつたものとされる部分の金額に過不足額があるとき。

Article 37-2, paragraph (2), item (ii)

where the person does not acquire an asset listed in the right-hand column of the respective items of the table in paragraph (1) of the preceding Article within the designated acquisition period, or does not use the replacement asset for the business referred to in paragraph (4) of that Article within one year from the date of the acquisition referred to in that paragraph, or ceases to use it for that business.

取得指定期間内に前条第一項の表の各号の下欄に掲げる資産の取得をせず、又は同条第四項の取得の日から一年以内に、買換資産を同項の事業の用に供せず、若しくは供しなくなつた場合

Article 37-2, paragraph (3)

Where a person falls under the provisions of paragraph (1) or item (ii) of the preceding paragraph, or where the shortfall prescribed in item (i) of that paragraph has arisen, if an amended return form is not filed, the district director with jurisdiction over the place for tax payment is to make a reassessment under Article 24 or Article 26 of the Act on General Rules for National Taxes with respect to the amount of income, the amount of income tax and other particulars that should have been stated in that return.

第一項若しくは前項第二号の規定に該当する場合又は同項第一号に規定する不足額を生ずることとなつた場合において、修正申告書の提出がないときは、納税地の所轄税務署長は、当該申告書に記載すべきであつた所得金額、所得税の額その他の事項につき国税通則法第二十四条又は第二十六条の規定による更正を行う。

Article 37-2, paragraph (4)

The provisions of Article 33-5, paragraph (3) apply mutatis mutandis to an amended return form under the provisions of paragraph (1) or paragraph (2) and to the reassessment referred to in the preceding paragraph. In this case, the phrase "the due date for filing prescribed in paragraph (1)" in paragraph (3), items (i) and (ii) of that Article is deemed to be replaced with "the due date for filing prescribed in Article 37-2, paragraph (1) or paragraph (2)", and the phrase "Article 33-5, paragraph (1)" in item (ii) of that paragraph is deemed to be replaced with "Article 37-2, paragraph (1) or paragraph (2)".

第三十三条の五第三項の規定は、第一項又は第二項の規定による修正申告書及び前項の更正について準用する。この場合において、同条第三項第一号及び第二号中「第一項に規定する提出期限」とあるのは「第三十七条の二第一項又は第二項に規定する提出期限」と、同号中「第三十三条の五第一項」とあるのは「第三十七条の二第一項又は第二項」と読み替えるものとする。

Article 37-3第三十七条の三

Calculation of Acquisition Price, etc. in the Case of Transfer of Specified Business Assets Pertaining to Replacement(買換えに係る特定の事業用資産の譲渡の場合の取得価額の計算等)
Article 37-3, paragraph (1)

Where, for a person who has received the application of the provisions of Article 37, paragraph (1) (including as applied mutatis mutandis pursuant to paragraphs (3) and (4) of that Article; hereinafter the same applies in this Article) (excluding a person who is no longer allowed the special provisions under Article 37, paragraph (1) because the person has filed an amended return form under paragraph (1) or paragraph (2) of the preceding Article or has received a reassessment under paragraph (3) of that Article), the amount of depreciation allowance under Article 49, paragraph (1) of the Income Tax Act pertaining to the replacement asset is calculated, or, where there is a transfer (including lending of real property, etc. giving rise to capital gains), inheritance, bequest or gift of the replacement asset on or after the date of its acquisition, the amount of capital gains is calculated, the acquisition price of the replacement asset is, pursuant to the provisions of Cabinet Order, the amount specified in the following items according to the category of cases listed in those items (where there are expenses incurred for the transfer referred to in Article 37, paragraph (1), the amount obtained by adding the amount of those expenses calculated pursuant to the provisions of Cabinet Order):

第三十七条第一項(同条第三項及び第四項において準用する場合を含む。以下この条において同じ。)の規定の適用を受けた者(前条第一項若しくは第二項の規定による修正申告書を提出し、又は同条第三項の規定による更正を受けたため、第三十七条第一項の規定による特例を認められないこととなつた者を除く。)の買換資産に係る所得税法第四十九条第一項の規定による償却費の額を計算するとき、又は当該買換資産の取得の日以後その譲渡(譲渡所得の基因となる不動産等の貸付けを含む。)、相続、遺贈若しくは贈与があつた場合において、譲渡所得の金額を計算するときは、政令で定めるところにより、当該買換資産の取得価額は、次の各号に掲げる場合の区分に応じ当該各号に定める金額(第三十七条第一項の譲渡に要した費用があるときは、政令で定めるところにより計算した当該費用の金額を加算した金額)とする。

Article 37-3, paragraph (1), item (i)

where the revenue from the transfer referred to in Article 37, paragraph (1) exceeds the acquisition price of the replacement asset: the sum of the amount calculated pursuant to the provisions of Cabinet Order as the amount of the portion of the acquisition price, etc. of the asset so transferred other than the portion corresponding to the excess amount and to the amount equivalent to 20 percent of the acquisition price of the replacement asset, and the amount equivalent to that 20 percent;

第三十七条第一項の譲渡による収入金額が買換資産の取得価額を超える場合 当該譲渡をした資産の取得価額等のうちその超える額及び当該買換資産の取得価額の百分の二十に相当する金額に対応する部分以外の部分の額として政令で定めるところにより計算した金額と当該百分の二十に相当する金額との合計額

Article 37-3, paragraph (1), item (ii)

where the revenue from the transfer referred to in Article 37, paragraph (1) is equal to the acquisition price of the replacement asset: the amount equivalent to the sum of the amount calculated pursuant to the provisions of Cabinet Order as the amount of the portion of the acquisition price, etc. of the asset so transferred other than the portion corresponding to the amount equivalent to 20 percent of that revenue, and the amount equivalent to that 20 percent;

第三十七条第一項の譲渡による収入金額が買換資産の取得価額に等しい場合 当該譲渡をした資産の取得価額等のうち当該収入金額の百分の二十に相当する金額に対応する部分以外の部分の金額として政令で定めるところにより計算した金額と当該百分の二十に相当する金額との合計額に相当する金額

Article 37-3, paragraph (1), item (iii)

where the revenue from the transfer referred to in Article 37, paragraph (1) is less than the acquisition price of the replacement asset: the amount equivalent to the amount obtained by adding the shortfall to the sum of the amount calculated pursuant to the provisions of Cabinet Order as the amount of the portion of the acquisition price, etc. of the asset so transferred other than the portion corresponding to the amount equivalent to 20 percent of that revenue, and the amount equivalent to that 20 percent.

第三十七条第一項の譲渡による収入金額が買換資産の取得価額に満たない場合 当該譲渡をした資産の取得価額等のうち当該収入金額の百分の二十に相当する金額に対応する部分以外の部分の額として政令で定めるところにより計算した金額と当該百分の二十に相当する金額との合計額にその満たない額を加算した金額に相当する金額

Article 37-3, paragraph (2)

In the case referred to in the preceding paragraph, for the purpose of applying the provisions of the preceding paragraph where the asset transferred as prescribed in Article 37, paragraph (1) falls under the assets listed in the left-hand column of item (ii) of the table in that paragraph and the replacement asset or the asset expected to be acquired falls under the assets listed in the right-hand column of that item, and the person has received the application of the provisions of that paragraph, the phrase "20 percent" in the items of the preceding paragraph is deemed to be replaced with "40 percent".

前項の場合において、第三十七条第一項に規定する譲渡をした資産が同項の表の第二号の上欄に掲げる資産に該当するものであり、かつ、買換資産又は取得をする見込みである資産が同号の下欄に掲げる資産に該当するときにおいて同項の規定の適用を受けたときにおける前項の規定の適用については、同項各号中「百分の二十」とあるのは、「百分の四十」とする。

Article 37-3, paragraph (3)

For the purpose of applying the provisions of paragraph (1) in the case referred to in paragraph (1) (limited to the case where the person has received the application of the provisions of Article 37, paragraph (1) pursuant to the provisions of paragraph (10) of that Article), the following items apply according to which of the areas listed in those items the replacement asset referred to in that paragraph is located in:

第一項の場合(第三十七条第十項の規定により同条第一項の規定の適用を受けた場合に限る。)における第一項の規定の適用については、同項の買換資産が次の各号に掲げる地域のうちいずれの地域内にあるかに応じ当該各号に定めるところによる。

Article 37-3, paragraph (3), item (i)

the area listed in Article 37, paragraph (10), item (i): the phrase "20 percent" in the items of paragraph (1) is deemed to be replaced with "10 percent";

第三十七条第十項第一号に掲げる地域 第一項各号中「百分の二十」とあるのは、「百分の十」とする。

Article 37-3, paragraph (3), item (ii)

the area listed in Article 37, paragraph (10), item (ii): the phrase "20 percent" in the items of paragraph (1) is deemed to be replaced with "25 percent";

第三十七条第十項第二号に掲げる地域 第一項各号中「百分の二十」とあるのは、「百分の二十五」とする。

Article 37-3, paragraph (3), item (iii)

the area listed in Article 37, paragraph (10), item (iii): the phrase "20 percent of" in paragraph (1), item (i) is deemed to be replaced with "30 percent (or 40 percent where both the asset so transferred and the replacement asset fall under the principal office assets prescribed in paragraph (10) of that Article; hereinafter the same applies in this paragraph) of", the phrase "that 20 percent" is deemed to be replaced with "that 30 percent", and the phrase "20 percent" in items (ii) and (iii) of that paragraph is deemed to be replaced with "30 percent".

第三十七条第十項第三号に掲げる地域 第一項第一号中「の百分の二十」とあるのは「の百分の三十(当該譲渡をした資産及び当該買換資産のいずれもが同条第十項に規定する主たる事務所資産に該当する場合には、百分の四十。以下この項において同じ。)」と、「当該百分の二十」とあるのは「当該百分の三十」と、同項第二号及び第三号中「百分の二十」とあるのは「百分の三十」とする。

Article 37-3, paragraph (4)

Where an individual has received the application of the provisions of Article 37, paragraph (1), the provisions listed in the items of Article 19, paragraph (1) do not apply to the replacement asset.

個人が第三十七条第一項の規定の適用を受けた場合には、買換資産については、第十九条第一項各号に掲げる規定は、適用しない。

Article 37-4第三十七条の四

Special Provisions on Taxation of Capital Gains in the Case of Exchange of Specified Business Assets(特定の事業用資産を交換した場合の譲渡所得の課税の特例)
Article 37-4, paragraph (1)

Where an individual, during the period from January 1, 1970 to December 31, 2029 (or March 31 of that year for the assets listed in the left-hand column of item (iii) of the table in Article 37, paragraph (1), and December 31, 2028 for those of the assets listed in the left-hand column of item (iv) of that table that are used for the construction business prescribed in that column or any other business specified by Cabinet Order), exchanges an asset held by the individual that is listed in the left-hand column of any item of that table and is used for the individual's business (hereinafter referred to as an "asset transferred by exchange" in this Article) for an asset listed in the right-hand column of that item (hereinafter referred to as an "asset acquired by exchange" in this Article) (excluding an exchange prescribed in Article 33-2, paragraph (1), item (ii) and other exchanges specified by Cabinet Order; hereinafter the same applies in this Article) (including the case where the individual receives or pays, in connection with the exchange, an exchange balancing payment (meaning money to compensate for the difference between the value of the asset acquired by the exchange and the value of the asset transferred by the exchange; hereinafter the same applies in this Article, the following Article and Article 37-8)), or exchanges an asset transferred by exchange for an asset other than an asset acquired by exchange and receives an exchange balancing payment (referred to as the "case of an exchange for other assets" in item (i)), the provisions of the preceding three Articles apply as follows:

個人が、昭和四十五年一月一日から令和十一年十二月三十一日(第三十七条第一項の表の第三号の上欄に掲げる資産にあつては同年三月三十一日とし、同表の第四号の上欄に掲げる資産のうち同欄に規定する建設業その他の政令で定める事業の用に供されるものにあつては令和十年十二月三十一日とする。)までの間に、その有する資産で同表の各号の上欄に掲げるもののうち事業の用に供しているもの(以下この条において「交換譲渡資産」という。)と当該各号の下欄に掲げる資産(以下この条において「交換取得資産」という。)との交換(第三十三条の二第一項第二号に規定する交換その他政令で定める交換を除く。以下この条において同じ。)をした場合(当該交換に伴い交換差金(交換により取得した資産の価額と交換により譲渡した資産の価額との差額を補うための金銭をいう。以下この条、次条及び第三十七条の八において同じ。)を取得し、又は支払つた場合を含む。)又は交換譲渡資産と交換取得資産以外の資産との交換をし、かつ、交換差金を取得した場合(第一号において「他資産との交換の場合」という。)における前三条の規定の適用については、次に定めるところによる。

Article 37-4, paragraph (1), item (i)

the asset transferred by exchange (in the case of an exchange for other assets, limited to the portion specified by Cabinet Order as corresponding to the exchange balancing payment) is deemed to have been transferred as referred to in Article 37, paragraph (1) by the individual on the date of the exchange for an amount equivalent to the value of the asset as of that date;

当該交換譲渡資産(他資産との交換の場合にあつては、交換差金に対応するものとして政令で定める部分に限る。)は、当該個人が、その交換の日において、同日における当該資産の価額に相当する金額をもつて第三十七条第一項の譲渡をしたものとみなす。

Article 37-4, paragraph (1), item (ii)

the asset acquired by exchange is deemed to have been acquired as referred to in Article 37, paragraph (1) by the individual on the date of the exchange for an amount equivalent to the value of the asset as of that date, and the individual is deemed to have filed the notification referred to in that paragraph.

当該交換取得資産は、当該個人が、その交換の日において、同日における当該資産の価額に相当する金額をもつて第三十七条第一項の取得をし、同項の届出をしたものとみなす。

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