株式会社は、次のいずれにも該当する場合には、第四百六十六条の規定にかかわらず、株主総会の決議によらないで、単元株式数（種類株式発行会社にあっては、各種類の株式の単元株式数。以下この条において同じ。）を増加し、又は単元株式数についての定款の定めを設ける定款の変更をすることができる。
Notwithstanding the provisions of Article 466, a stock company may effect an amendment to the articles of incorporation that will increase the size of the share unit (or, for a company with class shares, the size of the share unit for the shares of each class; hereinafter the same applies in this Article) or create the provisions in the articles of incorporation with respect to the share unit without a resolution at a shareholders meeting, in cases that fall under both of the following items:
株式の分割と同時に単元株式数を増加し、又は単元株式数についての定款の定めを設けるものであること。
that the amendment will increase the size of the share unit simultaneously with a share split, or create the provisions in the articles of incorporation with respect to the share unit; and
イに掲げる数がロに掲げる数を下回るものでないこと。
that the number provided for in (a) below is not less than the number provided for in (b) below:
当該定款の変更後において各株主がそれぞれ有する株式の数を単元株式数で除して得た数
the number obtained by dividing the number of the shares held by each shareholder after the amendment to the articles of incorporation by the share unit;
当該定款の変更前において各株主がそれぞれ有する株式の数（単元株式数を定めている場合にあっては、当該株式の数を単元株式数で除して得た数）
the number of the shares held by each shareholder before relevant amendment to the articles of incorporation (or, if the share unit is prescribed, the number obtained by dividing the number of relevant shares by the share unit).