Sanseitō

Sanseitō (Japanese: 参政党, lit. 'Political Participation Party'; self-rendered as Party of Do It Yourself in English, DIY) is an ultraconservative, right-wing populist political party in Japan. It is on the far-right of the political spectrum. The party was founded in 2020 by Sohei Kamiya, the current secretary general of the party, and won a seat in the 2022 House of Councillors election, also becoming an official political party by winning more than 2% of the vote in the election. Sanseitō gained international media attention during the 2022 House of Councillors election due to Kamiya's antisemitic rhetoric during public appearances and campaign rallies. In the 2024 general election, the party won 3 seats. In the 2025 House of Councillors election, the party won more than 14 seats and came in third in the national popular vote. According to the party's leader Kamiya, it is the Japanese equivalent of Trumpism in the United States.

The party promotes COVID-19 misinformation. The party's president, Manabu Matsuda, has called COVID-19 vaccines a "murder weapon". The party is against same-sex marriage and LGBT rights. The party strongly opposes immigration, claiming that foreigners bring crime and receive better treatment than native citizens. It proposes the creation of a new constitution to replace the existing one and published a draft that contains minimal human rights protections.