Article 31-4Deduction of Estimated Acquisition Cost for Long-Term Capital Gains
第三十一条の四（長期譲渡所得の概算取得費控除）
Where an individual transfers land, etc. or buildings, etc. that the individual has continuously owned since on or before December 31, 1952, notwithstanding the provisions of Article 38 and Article 61 of the Income Tax Act, the acquisition cost to be deducted from the revenue in calculating the amount of long-term capital gains is the amount equivalent to 5 percent of the revenue; provided, however, that if it is proved that the amount is less than the amount listed in each of the following items, it is the amount listed in that item:
the total of the amount required for the acquisition of the land, etc. and the amount of improvement expenses;
その土地等の取得に要した金額と改良費の額との合計額
the amount that would be deemed to be the acquisition cost pursuant to the provisions of Article 38, paragraph (2) of the Income Tax Act if the provisions of that paragraph were applied to the total of the amount required for the acquisition of the buildings, etc. and the amount of equipment expenses and improvement expenses.
その建物等の取得に要した金額と設備費及び改良費の額との合計額につき所得税法第三十八条第二項の規定を適用した場合に同項の規定により取得費とされる金額
The provisions of Article 30, paragraph (2) apply mutatis mutandis where the provisions of the preceding paragraph are applied. In this case, the term "forested land" in the main clause of paragraph (2) of that Article is deemed to be replaced with "land, etc. or buildings, etc. prescribed in Article 31-4, paragraph (1) (hereinafter referred to in this paragraph as "land or buildings, etc.")", and the term "forested land" in the proviso to that paragraph is deemed to be replaced with "land or buildings, etc.".