Japan

自由民主党
Jiyū-Minshutō (LDP)
Liberal Democratic Party
Party Leader: Fumio Kishida
Orientation: Conservative
International Affiliation: N/A

立憲民主党
Rikken-Minshutō (CDP)
Constitutional Democratic Party of Japan
Party Leader: Yoshihiko Noda
Orientation: Centre-left
International Affiliation: Council of Asian Liberals and Democrats

日本維新の会
Nippon Ishin no Kai (Ishin)
Party Leader: Nobuyuki Baba
Co-Leader: Hirofumi Yoshimura
Orientation: Libertarian
International Affiliation: N/A

公明党
Kōmei-tō (Komei)
Party Leader: Natsuo Yamaguchi
Orientation: Centre-right
International Affiliation: N/A

日本共産党
Nihon Kyōsan-tō (JCP)
Japanese Communist Party
Party Leader: Tomoko Tamura
Orientation: Left
International Affiliation: N/A

国民民主党
Kokumin-Minshutō (DPP)
Democratic Party for the People
Party Leader: Yūichirō Tamaki
Orientation: Centre-right
International Affiliation: N/A

れいわ新選組
Reiwa Shinsengumi (Reiwa)
Party Leader: Tarō Yamamoto
Party Co-Leaders: Akiko Ōishi and Mari Kushibuchi
Orientation: Left
International Affiliation: N/A

社会民主党
Shakai-Minshutō (SDP)
Social Democratic Party
Party Leader: Mizuho Fukushima
Orientation: Centre-left
International Affiliation: Socialist International

Ｎ国
N-Koku

(又は、NHKから国民を守る党;、NHKから自国民を守る党、NHK受信料を支払わない方法を教える党、古い政党から国民を守る党、嵐の党、NHKと裁判してる党弁護士法72条違反で、NHK受信料を支払わない国民を守る党、NHK党、政治家女子４８党、みんなでつくる党、等)
(also known as The Party to Protect Citizens from NHK; The Party to Protect the People from NHK; The Party That Teaches How Not to Pay the NHK License Fee; The Party to Protect People from Old Political Parties; Storm Party; The Party Fighting Against NHK in the Trial for Violating Article 72 of the Attorney Act; The Party that Protects Those who do Not Pay the NHK Licence Fee; NHK Party; Women Politicians 48 Party; The Collaborative Party; and so forth)

Party Leader: Ayaka Ōtsu, Takashi Tachibana (disputed)
Orientation: *
International Affiliation: N/A

参政党
Sanseitō (Sansei)

Party Leader: Sōhei Kamiya
Orientation: Right
International Affiliation: N/A