This Act comes into effect on April 1, 2006; 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 the Inheritance Tax Act as amended by the provisions of Article 3 (referred to as the "New Inheritance Tax Act" in this Article and Article 150 of the Supplementary Provisions) apply, except as otherwise provided in these Supplementary Provisions, 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 in this paragraph) on or after the Effective Date (including property that is deemed under the provisions of Article 21-16, paragraph (1) of the New Inheritance Tax Act to be acquired by inheritance prescribed in that paragraph where, on or after the Effective Date, the commencement of the succession of a specified donor prescribed in Article 21-9, paragraph (5) of the New Inheritance Tax Act has occurred), and the provisions then in force continue to govern inheritance tax on property acquired by inheritance or bequest before the Effective Date (including property that is deemed under the provisions of Article 21-16, paragraph (1) of the Inheritance Tax Act before amendment by the provisions of Article 3 (referred to as the "Former Inheritance Tax Act" in this Article and Article 150 of the Supplementary Provisions) to have been acquired by inheritance prescribed in that paragraph where, before the Effective Date, the commencement of the succession of a specified donor prescribed in Article 21-9, paragraph (5) of the Former Inheritance Tax Act has occurred).

②The provisions of the New Inheritance Tax Act apply, except as otherwise provided in these Supplementary Provisions, 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) on or after January 1, 2007, and the provisions then in force continue to govern gift tax on property acquired by gift before that date.

③The provisions then in force continue to govern a public notice made by the district director before the Effective Date pursuant to the provisions of Article 49, paragraph (1) or (2) of the Former Inheritance Tax Act.

④With regard to interest tax on an amount of inheritance tax for which permission to defer payment is granted pursuant to the provisions of Article 39, paragraph (2) or Article 43, paragraph (5) of the Former Inheritance Tax Act in the case where, on or after the Effective Date, the provisions then in force continue to govern pursuant to the provisions of paragraph (1), or interest tax on an amount of inheritance tax for which permission to defer payment was granted pursuant to the provisions of Article 39, paragraph (2) or Article 43, paragraph (5) of the Former Inheritance Tax Act in the case where, before the Effective Date, the provisions then in force continue to govern pursuant to the provisions of paragraph (1), for which the due date for payment of the installment payment relating to that amount of inheritance tax falls on or after the Effective Date (excluding that for which that due date first falls on or after the Effective Date), the provisions of Article 52, paragraph (1) of the Former Inheritance Tax Act remain in force. In this case, in item (i) of that paragraph, the phrase "the number of months in the period until the due date for payment" is deemed to be replaced with "the period until the due date for payment" and the phrase "the amount (where payment was made before that due date, the amount obtained by deducting from the amount so calculated the amount calculated by multiplying the amount of tax paid before that due date by the rate of interest tax according to the number of months in the period from the day following the date of its payment until that due date (where that amount of tax was paid in two or more installments, the total of those amounts))" with "the amount", and in item (ii) of that paragraph, the phrase "according to the number of months, the amount calculated by multiplying by the rate of interest tax (where payment was made before that due date, the amount obtained by deducting from the amount so calculated the amount calculated by multiplying the amount of tax paid before that due date by the rate of interest tax according to the number of months in the period from the day following the later of the date of its payment and the due date for payment of the previous installment payment until the due date for payment of the installment payment of that time (where that amount of tax was paid in two or more installments, the total of those amounts))" is deemed to be replaced with "according to the period, the amount calculated by multiplying by the rate of interest tax".

⑤With regard to interest tax on an amount of gift tax for which permission to defer payment is granted pursuant to the provisions of Article 39, paragraph (2) as applied mutatis mutandis pursuant to Article 39, paragraph (3) of the Former Inheritance Tax Act in the case where, on or after the Effective Date, the provisions then in force continue to govern pursuant to the provisions of paragraph (2), or interest tax on an amount of gift tax for which permission to defer payment was granted pursuant to the provisions of Article 39, paragraph (2) as applied mutatis mutandis pursuant to Article 39, paragraph (3) of the Former Inheritance Tax Act in the case where, before the Effective Date, the provisions then in force continue to govern pursuant to the provisions of paragraph (2), for which the due date for payment of the installment payment relating to that amount of gift tax falls on or after the Effective Date (excluding that for which that due date first falls on or after the Effective Date), the provisions of Article 52, paragraph (1) of the Former Inheritance Tax Act remain in force. In this case, in item (i) of that paragraph, the phrase "the number of months in the period until the due date for payment" is deemed to be replaced with "the period until the due date for payment" and the phrase "the amount (where payment was made before that due date, the amount obtained by deducting from the amount so calculated the amount calculated by multiplying the amount of tax paid before that due date by the rate of interest tax according to the number of months in the period from the day following the date of its payment until that due date (where that amount of tax was paid in two or more installments, the total of those amounts))" with "the amount", and in item (ii) of that paragraph, the phrase "according to the number of months, the amount calculated by multiplying by the rate of interest tax (where payment was made before that due date, the amount obtained by deducting from the amount so calculated the amount calculated by multiplying the amount of tax paid before that due date by the rate of interest tax according to the number of months in the period from the day following the later of the date of its payment and the due date for payment of the previous installment payment until the due date for payment of the installment payment of that time (where that amount of tax was paid in two or more installments, the total of those amounts))" is deemed to be replaced with "according to the period, the amount calculated by multiplying by the rate of interest tax".

⑥The provisions of Article 64, paragraphs (1) through (3) of the New Inheritance Tax Act apply to acts or calculations performed by a corporation on or after the Effective Date, and the provisions then in force continue to govern acts or calculations performed by a corporation before the Effective Date.

⑦The provisions of Article 64, paragraph (4) of the New Inheritance Tax Act apply to acts or calculations performed by a corporation on or after October 1, 2006, and the provisions then in force continue to govern acts or calculations performed by a corporation 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.