Composition

Composition of the House of Representatives of Japan
(following the 2026 Japanese general election, results as of 8 February 2026) ^[1]

Parliamentary groups/caucuses		Parties	Seats
	Liberal Democratic Party / Assembly of Independents Jiyūminshutō・Mushozoku no Kai	Liberal Democratic Party (LDP) Independents	316
	Centrist Reform Alliance Chūdō Kaikaku Rengō	Constitutional Democratic Party (CDP) Komeito	49
	Nippon Ishin no Kai Nippon Ishin no Kai	Nippon Ishin no Kai	36
	Democratic Party for the People / Independent Club Kokumin Minshutō・Mushozoku Kurabu	Democratic Party For the People (DPFP)	28
	Sanseitō Sanseitō	Sanseitō	15
	Team Mirai Chīmu Mirai	Team Mirai	11
	Japanese Communist Party Nihon Kyōsantō	Japanese Communist Party (JCP)	4
	Reiwa Shinsengumi Reiwa Shinsengumi	Reiwa Shinsengumi	1
	Tax Cuts Japan and Yukoku Alliance Genzei Nippon Yūkoku Rengō	Tax Cuts Japan and Yukoku Alliance	1
	Independents (not member of a caucus) Mushozoku	Independents (not member of a party)	4
Total			465
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List of members by parliamentary group and constituency. There are usually translations and abbreviations for parliamentary groups (会派, kaiha; current House of Representatives website translation: "In-House Group") used on the English pages of the House of Representatives website, ^[2]

•   LDP
•   CRA
•   Nippon Ishin
•   DPFP
•   Sanseitō
•   Team Mirai
•   JCP
•   Reiwa
•   Genzei Nippon
•   Independents

Notes:

• Not all members of a parliamentary group are necessarily members of the associated party/parties if any, and vice versa. For example, the Speaker and Vice-Speaker of the House of Representatives are independents in terms of parliamentary group membership, but not independents in terms of party membership.
• The count of terms as given by the House of Representatives follows the usual way of counting them in Japan by number of won elections (tōsen kaisū) which is not necessarily identical to election periods of the House of Representatives. For example, former member Nobutaka Machimura served for two terms as a member during the (2009–2012) 45th election period of the House of Representatives: one as member for the Hokkaidō proportional constituency from the general election in August 2009 to his resignation in September 2010, and one as member for constituency number 5 in Hokkaidō from the by-election in October 2010 to dissolution in November 2012. Among other things, the election count determines the seating within a parliamentary group, the more senior members by this measure sit in the back.
• Most proportional members of the House of Representatives have been deleted.

Composition

Composition of the House of Councillors of the National Diet of Japan (as of 15 February 2026, after 220th National Diet) ^[51]

Caucus (English name) [52] (Japanese name)		Parties	Members
			Term						Total
			26 July 2022 – 25 July 2028 (elected 2022, up 2028)			29 July 2025 – 28 July 2031 (elected 2025, up 2031)
			PR	SNTV/FPTP	Subtotal	PR	SNTV/FPTP	Subtotal
Government									120
	Liberal Democratic Party and Group of Independents Jiyūminshutō / Mushozoku no Kai	Liberal Democratic Party (LDP) Independent	18	43	61	12	28	40	101
	Nippon Ishin (Japan Innovation Party) Nippon Ishin no Kai	Nippon Ishin no Kai	8	4	12	4	3	7	19
Opposition									121
	The Constitutional Democratic Party of Japan and Independents Rikken-minshu / Mushozoku	Constitutional Democratic Party (CDP) Independents	7	10	17	7	16	23	40
	Democratic Party For the People and The Shin-Ryokufukai Kokumin-minshutō / Shin-Ryokufūkai	Democratic Party For the People (DPFP)	3	4	7	7	11	18	25
	Komeito Kōmeitō	Komeito	6	7	13	4	4	8	21
	Sanseito Sanseitō	Sanseitō	1	0	1	7	7	14	15
	Japanese Communist Party Nihon Kyōsantō	Japanese Communist Party (JCP)	3	1	4	2	1	3	7
	Reiwa Shinsengumi Reiwa Shinsengumi	Reiwa Shinsengumi	2	0	2	3	0	3	5
	Conservative Party of Japan Nihon Hoshutō	Conservative Party of Japan	0	0	0	2	0	2	2
	Okinawa Whirlwind Okinawa no Kaze	Independents	0	1	1	0	1	1	2
	Team Mirai and the Independent Chīmu Mirai / Mushozoku no Kai	Team Mirai Independent	0	0	0	1	1	2	2
	Social Democratic Party Shakai Minshutō	Social Democratic Party (SDP)	1	0	1	1	0	1	2
Unaffiliated			1	3	4	0	2	2	6
	Independents Members not affiliated with any parliamentary caucus	LDP 1 (President) CDP 1 (Vice President) Independents
Total			50	73	123	50	74	124	247
	Vacant: one constituency seat in Tokyo (2028 class), vacant since the resignation of incumbent Reiwa Shinsengumi leader, Taro Yamamoto, on 21 January 2026 [53] (no by-election held per Public Offices Election Act; threshold of one-quarter of district seats not met) [54]	N/A	0	1	1	0	0	0	1
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List of members by parliamentary group and constituency: ^{[55] [52]}

•   Liberal Democratic Party and Group of Independents (LDP-GI)
•   The Constitutional Democratic Party of Japan and the Independent (CDP)
•   Democratic Party For the People and The Shin-Ryokufukai (DPFP-SR)
•   Komeito (KP)
•   Nippon Ishin (Japan Innovation Party) (JIP)
•   Sanseito (SAN)
•   Japanese Communist Party (JCP)
•   Reiwa Shinsengumi (Reiwa)
•   Conservative Party of Japan (CPJ)
•   Okinawa Whirlwind (OW)
•   Team Mirai and the Independent (MIRAI)
•   Social Democratic Party (SDP)
•   Independents (I)

Notes:

• Not all members of a caucus are also members of the affiliated party, and sometimes even some members of a party are not member of the affiliated caucus.

Members