This Act comes into effect on April 1, 2019; provided, however, that the provisions set forth in the following items come into effect as of the days specified in those items.

①The provisions of Article 19-3 of the Inheritance Tax Act as amended by the provisions of Article 3 (referred to as the "New Inheritance Tax Act" in this Article) apply to inheritance tax on property acquired by inheritance or bequest (including a gift that takes effect upon the death of the person who made the gift; the same applies hereinafter) on or after April 1, 2022, and the provisions then in force continue to govern inheritance tax on property acquired by inheritance or bequest before that date.

②Where a person who falls under the provisions of Article 19-3, paragraph (1) of the New Inheritance Tax Act is a person who has been subject to the application of the provisions of Article 19-3, paragraph (1) or (2) of the Inheritance Tax Act before the amendment by the provisions of Article 3 (referred to as the "Former Inheritance Tax Act" in this Article) or the Inheritance Tax Act before the amendment by the provisions of Article 3 of the Act Partially Amending the Income Tax Act, etc. (Act No. 5 of 2013) (collectively referred to as the "Former Act" in this paragraph) with regard to inheritance tax on property acquired by inheritance or bequest before April 1, 2022, by that person or by a person under a duty of support prescribed in paragraph (2) of that Article, the amount for which that person or that person under a duty of support may receive a deduction under the provisions of Article 19-3, paragraph (1) or (2) of the New Inheritance Tax Act is, notwithstanding paragraph (3) of that Article, the amount up to the amount obtained by deducting the total amount of the deductions already received under the provisions of Article 19-3, paragraph (1) or (2) of the Former Act or Article 19-3, paragraph (1) or (2) of the New Inheritance Tax Act from the amount for which a deduction could be received if the provisions of paragraph (1) of that Article were applied to that inheritance tax (where a deduction has been received under the provisions of Article 19-3, paragraph (1) or (2) of the Former Act two or more times, the amount for which a deduction could be received if the provisions of Article 19-3, paragraph (1) of the New Inheritance Tax Act were applied at the time of first acquiring property by inheritance or bequest).

③The provisions of Article 21-9, paragraphs (1) and (4) of the New Inheritance Tax Act apply to gift tax on property acquired by gift (excluding a gift that takes effect upon the death of the person who made the gift; the same applies hereinafter in this paragraph and Article 79 of the Supplementary Provisions) on or after April 1, 2022, and the provisions then in force continue to govern gift tax on property acquired by gift before that date.

④The provisions of the New Inheritance Tax Act (limited to the portion relating to Article 32, paragraph (1), item (iii)) apply to inheritance tax or gift tax relating to a succession that commences on or after July 1, 2019, and the provisions then in force continue to govern inheritance tax or gift tax relating to the amount to be returned or compensated for prescribed in Article 32, paragraph (1), item (iii) of the Former Inheritance Tax Act in connection with a succession that commenced before that day.

With regard to the application of penal provisions to acts committed before this Act (or, for the provisions set forth in the items of Article 1 of the Supplementary Provisions, those provisions; the same applies hereinafter in this Article) comes into effect and to acts committed after this Act comes into effect in the cases where the provisions then in force continue to govern pursuant to the provisions of these Supplementary Provisions, the provisions then in force continue to govern.

Beyond what is provided for in these Supplementary Provisions, transitional measures necessary in connection with the enforcement of this Act are specified by Cabinet Order.