①If the employer of a place of business that became an applicable place of business pursuant to Article 31, paragraph (1) of the Health Insurance Act on or after October 1, 2035, or the employer of another place of business specified by Cabinet Order (excluding an employer that has already made the application under this paragraph; the same applies hereinafter in this paragraph), makes an application to the insurer, etc. as specified by Order of the Ministry of Health, Labour and Welfare, by the month preceding the month which contains the day on which two years have elapsed from the day on which the place of business became that applicable place of business (for the employer of a place of business specified by Cabinet Order, the day specified by Cabinet Order), the employer may, for the time being, notwithstanding Article 161, paragraph (1) of that Act and the preceding Article, increase the proportion of the insurance premiums prescribed in Article 155, paragraph (1) of that Act that the employer is to bear for part-time insured persons employed at the applicable place of business (excluding those appropriated to the costs required for health insurance services prescribed in that paragraph (limited to the costs required for payment of the levies under the provisions of the Long-Term Care Insurance Act, the children and child-rearing support levy under the provisions of the Act on Support for Children and Child-rearing and, in the case of part-time insured persons administered by a health insurance society, the contributions under the provisions of Article 173 of the Health Insurance Act), those pertaining to the standard bonus amount determined pursuant to Article 45, paragraph (1) of that Act, and those not paid by the time limit designated pursuant to Article 180, paragraph (1) of that Act; hereinafter in this paragraph referred to as the "health insurance premium for part-time insured persons") to the proportion obtained by adding 50% to the increased burden ratio. In this case, the amount obtained by multiplying the amount equivalent to the amount obtained by multiplying the standard monthly remuneration amount for part-time insured persons by the general insurance premium rate prescribed in Article 160, paragraph (1) of that Act, within the amount of the health insurance premium for part-time insured persons, by the increased burden ratio (where a health insurance society has increased the proportion of the general insurance premium amount to be borne by the employer pursuant to Article 162 of that Act, the proportion obtained by deducting from the increased burden ratio the proportion increased pursuant to that Article (or zero if that proportion falls below zero)) is deemed not to have been required to be collected.

②The provisions of paragraphs (3) through (10) of the preceding Article apply mutatis mutandis to the case of applying the provisions of the preceding paragraph. In this case, necessary replacement of terms in applying those provisions and other necessary matters are specified by Cabinet Order.

③In this Article, a "part-time insured person" means a person who falls under any of the following items, who does not fall under any of the items of Article 3, paragraph (1) of the Health Insurance Act as amended by the provisions of Article 33 (limited to the amending provision set forth in Article 1, paragraph (1), item (ix) of the Supplementary Provisions) (hereinafter in this paragraph and Article 38 of the Supplementary Provisions referred to as the "item (ix) Amended Health Insurance Act") (excluding a person to whom the provisions of Article 3, paragraph (1) of the item (ix) Amended Health Insurance Act (limited to the part pertaining to item (ix)) are not applied pursuant to Article 45 of the Supplementary Provisions of the 2012 Pension Function Strengthening Act), and who is an insured person of health insurance (limited to a person who falls under grade 1 through grade 9 of the standard monthly remuneration grades).