In Japan, any organization that supports a candidate needs to register itself as a political party. Each of these parties have some local or national influence. This article lists political parties in Japan with representation in the National Diet, either in the House of Representatives (lower house) or in the House of Councillors (upper house). The article also mentions political parties within the nation that either used to be within representation, or parties that currently are.
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👉 Political party in Japan in the context of Japan Innovation Party
The Japan Innovation Party (日本維新の会, Nippon Ishin no Kai; Japan Restoration Association) is a conservative, centre-right to right-wing and populist political party in Japan.
The party was as Initiatives from Osaka in October 2015 from a split in the old Japan Innovation Party. It became the third-biggest opposition party in the National Diet following the 2016 House of Councillors election. Since 2025, the party has been in a coalition agreement to provide confidence and supply to the governing Liberal Democratic Party (LDP).
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Political party in Japan in the context of Komeito
Komeito (公明党, Kōmeitō), formerly New Komeito (NKP) and commonly referred to as simply Komei, is a political party in Japan affiliated with the Soka Gakkai religious movement. It is generally considered centrist and socially conservative. From 1999 to 2009 and from 2012 to 2025, it served in government as the junior coalition partner of the Liberal Democratic Party (LDP).
Komeito was founded by the leader of Soka Gakkai, Daisaku Ikeda, in 1964. In 1993 and 1994, Komeito joined the non-LDP governments of Morihiro Hosokawa and Tsutomu Hata. With the collapse of the Hata government in 1994, Komeito split into New Kōmei Party and Kōmei; the New Kōmei Party merged with other smaller opposition parties to establish the New Frontier Party (NFP). After the dissolution of the NFP in 1997, some former New Kōmei Party established the New Peace Party, which merged with Kōmei in 1998 to establish the New Komeito. In 1999, the party entered into a coalition with LDP, serving in the government until the coalition lost power in 2009. In 2012, the coalition regained power. In 2014 the party changed its English name back to Komeito. In 2025, Komeito ended its alliance with the LDP.