①The Minister of Health, Labour and Welfare may, with respect to a person entitled to receive a disability basic pension, examine that person's degree of disability, and when the Minister finds that the degree falls under a disability grade other than the previous disability grade, revise the amount of the disability basic pension.

②A person entitled to receive a disability basic pension may claim, from the Minister of Health, Labour and Welfare, revision of the amount of the disability basic pension on the ground that the degree of disability has increased.

③The claim under the preceding paragraph may not be made until after the day on which one year has elapsed, calculated from the day the person entitled to receive the disability basic pension acquired the right to receive it, or the day the person underwent the examination by the Minister of Health, Labour and Welfare under the provisions of paragraph (1), except in a case specified by Order of the Ministry of Health, Labour and Welfare as a case where it is clear that the degree of disability of the person entitled to receive the disability basic pension has increased.

④Where a person entitled to receive a disability basic pension, who has suffered an illness or been injured, and who fell under any of the items of Article 30, paragraph (1) on the date of first medical examination relating to that injury or illness (limited to one whose date of first medical examination is after the date of first medical examination for the injury or illness relating to the disability that was the ground for payment of that disability basic pension; the same applies hereinafter in this paragraph and in the proviso to Article 36, paragraph (2)), is in a state of disability (limited to one not falling under the disability grade; hereinafter in this paragraph and in the proviso to Article 36, paragraph (2) referred to as "other disability") because of that injury or illness, and, during the period from the disability recognition date relating to that injury or illness until the day preceding the day of reaching 65 years of age, the degree of disability obtained by combining the disability that was the ground for payment of that disability basic pension with the other disability (or, where there are two or more other disabilities, the disability obtained by combining all of the other disabilities) has increased beyond the degree of the disability that was the ground for payment of that disability basic pension, that person may claim, from the Minister of Health, Labour and Welfare, within that period, revision of the amount of that disability basic pension.

⑤The provisions of the proviso to Article 30, paragraph (1) apply mutatis mutandis to the case referred to in the preceding paragraph.

⑥When the amount of the disability basic pension has been revised under the provisions of paragraph (1), payment of the disability basic pension in the revised amount is to begin from the month following the month in which the day the revision was made falls.