Where an individual who files a blue return and who operates a marine transportation business specified by Cabinet Order (hereinafter referred to in this paragraph as a "specified marine transportation business") acquires, during the period from April 1, 2021 to March 31, 2029, a ship listed in any of the following items among the ships specified by Cabinet Order as contributing to the rationalization of the management of the specified marine transportation business and to the reduction of environmental load (hereinafter referred to in this Article as a "specified ship") that has not been used for business since its manufacture, or manufactures a specified ship, and puts it to use for the individual's specified marine transportation business (excluding the case where the individual puts to that use the specified ship acquired through a lease transaction without transfer of ownership and the case where a person other than an individual specified by Cabinet Order puts it to use for leasing), the amount to be included in necessary expenses as the depreciation allowance for that specified ship in calculating the amount of business income of the individual for the year that includes the day on which it was put to that use, notwithstanding the provisions of Article 49, paragraph (1) of the Income Tax Act, is the amount calculated by the individual as necessary expenses, up to the sum of the amount of depreciation allowance calculated for that specified ship pursuant to the provisions of that paragraph and the special depreciation limit (meaning the amount calculated by multiplying the acquisition cost of that specified ship by the percentage specified in each of those items according to the category of ships listed in that item) (referred to in the following paragraph as the "total depreciation limit"); provided, however, that it may not be less than the amount to be included in necessary expenses as the depreciation allowance for that specified ship pursuant to the provisions of paragraph (1) of that Article.
青色申告書を提出する個人で政令で定める海上運送業(以下この項において「特定海上運送業」という。)を営むものが、令和三年四月一日から令和十一年三月三十一日までの間に、特定海上運送業の経営の合理化及び環境への負荷の低減に資するものとして政令で定める船舶のうち次の各号に掲げるもの(以下この条において「特定船舶」という。)でその製作の後事業の用に供されたことのないものを取得し、又は特定船舶を製作して、これを当該個人の特定海上運送業の用に供した場合(所有権移転外リース取引により取得した当該特定船舶をその用に供した場合又は政令で定める個人以外のものが貸付けの用に供した場合を除く。)には、その用に供した日の属する年における当該個人の事業所得の金額の計算上、当該特定船舶の償却費として必要経費に算入する金額は、所得税法第四十九条第一項の規定にかかわらず、当該特定船舶について同項の規定により計算した償却費の額と特別償却限度額(当該特定船舶の取得価額に当該各号に掲げる船舶の区分に応じ当該各号に定める割合を乗じて計算した金額をいう。)との合計額(次項において「合計償却限度額」という。)以下の金額で当該個人が必要経費として計算した金額とする。ただし、当該特定船舶の償却費として同条第一項の規定により必要経費に算入される金額を下ることはできない。