On July 3, 2025, Sohei Kamiya, leader of the Sanseitō party, stated during his first campaign speech for the House of Councillors election in Tokyo that "older women cannot have children," citing it as a biological fact rather than discrimination. He emphasized the need for Japan to create a society where young women feel safe and supported to have children, rather than merely being encouraged to work. The statement drew public attention and controversy, with some criticizing it as discriminatory and damaging to women's dignity. The official YouTube channel of Sanseitō removed the video segment containing the remark. Kamiya later responded to criticisms by questioning whether his statement was truly discriminatory. The remarks sparked debate amid ongoing discussions about Japan's declining birthrate and policies addressing demographic challenges.