Kamiya’s political party, Sanseito – literally the “political participation party” – has been described as far-right, ultraconservative and nationalist – with migrants, the “liberal elite” and foreign capital the objects of its anger. Its nickname – the do-it-yourself party – speaks to its role, it says, as a place for self-starters who have grown tired of the Japanese political mainstream. View image in fullscreen Supporters of Japan’s Sanseito party leader react during the party’s rally in Tokyo in July. View image in fullscreen Japan’s Sanseito party leader Sohei Kamiya poses with his lawmakers during a rally in Tokyo. The population of Japanese nationals, by contrast, fell to a record low of 120.6 million, according to the latest government data.