This Act comes into effect on April 1, 2010; provided, however, that the provisions set forth in the following items come into effect on the dates specified respectively in those items:

Except as otherwise provided in these Supplementary Provisions, the provisions of the Inheritance Tax Act as amended by the provisions of Article 3 (hereinafter referred to as the "New Inheritance Tax Act" through Article 33 of the Supplementary Provisions) apply to inheritance tax or gift tax on property to be 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) or by gift (excluding a gift that takes effect upon the death of the person who made the gift; the same applies hereinafter) on or after the Effective Date, and the provisions then in force continue to govern inheritance tax or gift tax on property acquired by inheritance or bequest or by gift before the Effective Date.

In the case where a person with a disability prescribed in Article 19-4, paragraph (1) of the New Inheritance Tax Act who falls under that paragraph is a person who, in respect of inheritance tax on property acquired by inheritance or bequest before the Effective Date by that person or a person under a duty of support for that person (meaning a person under a duty of support prescribed in Article 19-3, paragraph (2) of the New Inheritance Tax Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the New Inheritance Tax Act; hereinafter referred to as a "person under a duty of support" in this Article), has received the application of the provisions of Article 19-4, paragraph (1) of the Inheritance Tax Act prior to amendment by the provisions of Article 3 (referred to as the "Former Inheritance Tax Act" in Article 33 of the Supplementary Provisions), the Inheritance Tax Act prior to amendment by the provisions of Article 3 of the Act Partially Amending the Income Tax Act, etc. (Act No. 109 of 1988), the Inheritance Tax Act prior to amendment by the Act Partially Amending the Inheritance Tax Act (Act No. 15 of 1975), or the Inheritance Tax Act prior to amendment by the Act Partially Amending the Inheritance Tax Act (Act No. 6 of 1973) (hereinafter collectively referred to as the "Former Act" in this Article), or Article 19-3, paragraph (2) of the Former Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the Former Act, the amount of deduction that that person or the person under a duty of support for that person may receive under Article 19-4, paragraph (1) of the New Inheritance Tax Act, or Article 19-3, paragraph (2) of the New Inheritance Tax Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the New Inheritance Tax Act, is, notwithstanding Article 19-3, paragraph (3) of the New Inheritance Tax Act, the amount up to the remainder obtained by deducting the total of the amounts of deduction already received under Article 19-4, paragraph (1) of the Former Act, Article 19-3, paragraph (2) of the Former Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the Former Act, Article 19-4, paragraph (1) of the New Inheritance Tax Act, or Article 19-3, paragraph (2) of the New Inheritance Tax Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the New Inheritance Tax Act from the amount of deduction that could be received if Article 19-4, paragraph (1) of the New Inheritance Tax Act were applied to that inheritance tax (or, if the deduction under Article 19-4, paragraph (1) of the Former Act or Article 19-3, paragraph (2) of the Former Act as applied mutatis mutandis pursuant to Article 19-4, paragraph (3) of the Former Act was received two or more times, the amount of deduction that could be received if Article 19-4, paragraph (1) of the New Inheritance Tax Act were applied when the person first acquired property by inheritance or bequest).

①The provisions of Article 24 of the New Inheritance Tax Act apply to inheritance tax or gift tax on a right relating to a contract for periodic payments acquired by inheritance or bequest or by gift on or after April 1, 2011, and the provisions then in force continue to govern inheritance tax or gift tax on a right relating to a contract for periodic payments acquired by inheritance or bequest or by gift before that date.

②In the case where a right relating to a contract for periodic payments concluded during the period from the Effective Date to March 31, 2011 (limited to one prescribed in Article 24 of the New Inheritance Tax Act) is acquired by inheritance or bequest or by gift by that date, the value of that right is, notwithstanding the preceding paragraph, the amount prescribed in that Article; provided, however, that this does not apply to a right relating to a contract for periodic payments that relates to any of the following:

The provisions of Article 64, paragraph (4) of the New Inheritance Tax Act apply to the case where, on or after October 1, 2010, a merger, etc. prescribed in that paragraph (limited, as for the distribution of residual assets among the distributions in kind prescribed in that paragraph, to one resulting from a dissolution on or after that date) is carried out, and the provisions then in force continue to govern the case where a merger, etc. prescribed in Article 64, paragraph (4) of the Former Inheritance Tax Act was carried out before that date.

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.