List of members of the Diet of Japan explained

This is a list of members of the Diet of Japan. The Diet has two chambers: the House of Councillors (upper house) and the House of Representatives (lower house). Councillors serve six year terms, with half being elected every three years. Representatives serve terms of up to four years, but the House of Representatives can be dissolved, causing a shorter term (snap election).

House of Representatives

Members of the House of Representatives elected in the 43rd general election	(2003)
Members of the House of Representatives elected in the 44th general election	(2005)
Members of the House of Representatives elected in the 45th general election	(2009)
Members of the House of Representatives elected in the 46th general election	(2012)
Members of the House of Representatives elected in the 47th general election	(2014)
Members of the House of Representatives elected in the 48th general election – Current List	(2017)
Members of the House of Representatives elected in the 49th general election	(2021)

Composition

List of members by parliamentary group and constituency. There are usually translations and abbreviations for used on the English pages of the House of Representatives website,^[1]

• • • • • • • • • • LDP Kōmeitō CDP DPFP JCP Nippon Ishin Group of Independents SDP Kibo 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.

Members of the House of Representatives (as of April 26, 2021)^[2]

Constituency	Elected Members	Parliamentary group		Notes
Hokkaido 12 single-member and 8 proportional representation seats.
Hokkaido-1st
Hokkaido-2nd
Hokkaidō–3rd
Hokkaidō–4th
Hokkaidō–5th
Hokkaidō–6th
Hokkaidō–7th
Hokkaidō–8th
Hokkaidō–9th
Hokkaidō–10th
Hokkaidō–11th
Hokkaidō–12th
Hokkaido block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Hokkaidō block
Tōhoku 23 single-member and 13 proportional representation seats.
Aomori Prefecture
Aomori–1st
Aomori–2nd
Aomori–3rd
Iwate Prefecture
Iwate–1st
Iwate–3rd
Miyagi Prefecture
Miyagi–1st
Miyagi–2nd
Miyagi–3rd
Miyagi–4th
Miyagi–5th
Miyagi–6th
Akita Prefecture
Akita–1st
Akita–2nd
Akita–3rd
Yamagata Prefecture
Yamagata–1st
Yamagata–2nd
Yamagata–3rd
Fukushima Prefecture
Fukushima–1st
Fukushima–2nd
Fukushima–3rd
Fukushima–4th
Fukushima–5th
Tōhoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
Tohoku Block
North Kanto(Kita Kanto) 32 single-member and 19 proportional representation seats.
Ibaraki Prefecture
Ibaraki–1st
Ibaraki–2nd
Ibaraki–3rd
Ibaraki–4th
Ibaraki–5th
Ibaraki–6th
Ibaraki–7th
Tochigi Prefecture
Tochigi–1st
Tochigi–2nd
Tochigi–3rd
Tochigi–4th
Tochigi–5th
Gunma Prefecture
Gunma–1st
Gunma–2nd
Gunma–3rd
Gunma–4th
Gunma–5th
Saitama Prefecture
Saitama–1st
Saitama–2nd
Saitama–3rd
Saitama–4th
Saitama–5th
Saitama–6th
Saitama–7th
Saitama–8th
Saitama–9th
Saitama–10th
Saitama–11th
Saitama–12th
Saitama–13th
Saitama–14th
Saitama–15th
Kitakanto block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block
Kitakantō block	Keinin Horikoshi
Kitakantō block	Masako Ōkawara
Kitakantō block	Rentaro Takagi
Kitakantō block	Toshikazu Morita
Kitakantō block	Yamato Aoyama
Kitakantō block	Yasuko Komiyama
Kitakantō block	Keiichi Ishii
Kitakantō block	Mitsunari Okamoto
Kitakantō block	Tetsuya Shiokawa
Kitakantō block
South Kanto(Minami Kanto) 33 single-member and 22 proportional representation seats.
Chiba Prefecture
Chiba-1st
Chiba-2nd
Chiba-3rd
Chiba-4th
Chiba-5th
Chiba-6th
Chiba-7th
Chiba-8th
Chiba-9th
Chiba-10th
Chiba-11th
Chiba-12th
Chiba-13th
Kanagawa Prefecture
Kanagawa-1st
Kanagawa-2nd
Kanagawa-3rd
Kanagawa-4th
Kanagawa-5th
Kanagawa-6th
Kanagawa-7th
Kanagawa-8th
Kanagawa-9th
Kanagawa-10th
Kanagawa-11th
Kanagawa-12th
Kanagawa-13th
Kanagawa-14th
Kanagawa-15th
Kanagawa-16th
Kanagawa-17th
Kanagawa-18th
Yamanashi Prefecture
Yamanashi-1st
Yamanashi-2nd
Minamikanto block
Minamikanto block	Minoru Debata
Minamikanto block	Shinichi Nakatani
Minamikanto block	Norihiro Nakayama
Minamikanto block	Tsuyoshi Hoshino
Minamikanto block	Tomohiro Yamamoto
Minamikanto block	Hidehiro Mitani
Minamikanto block	Tetsuya Kimura
Minamikanto block	Hiroshi Ueno
Minamikanto block	Yukio Ubukata
Minamikanto block	Kazuma Nakatani
Minamikanto block	Go Shinohara
Minamikanto block	Shin Miyakawa
Minamikanto block	Kazuma Okajima
Minamikanto block	Kaname Tajima
Minamikanto block	Hajime Yatagawa
Minamikanto block	Yuichi Goto
Minamikanto block	Soichiro Okuno
Minamikanto block
Minamikanto block
Minamikanto block
Minamikanto block
Minamikanto block	Seiichi Kushida
Tokyo 25 single-member and 17 proportional representation seats.
Tokyo–1st
Tokyo–2nd
Tokyo–3rd
Tokyo–4th
Tokyo–5th
Tokyo–6th
Tokyo–7th
Tokyo–8th
Tokyo–9th
Tokyo–10th
Tokyo–11th
Tokyo–12th
Tokyo–13th	Ichiro Kamoshita
Tokyo–14th
Tokyo–15th
Tokyo–16th
Tokyo–17th
Tokyo–18th
Tokyo–19th
Tokyo–20th
Tokyo–21st
Tokyo–22nd
Tokyo–23rd
Tokyo–24th
Tokyo–25th
Tokyo block
Tokyo block	Takao Ochi
Tokyo block	Miki Yamada
Tokyo block	Kiyoshi Odawara
Tokyo block	Fumiaki Matsumoto
Tokyo block	Takao Ando
Tokyo block	Kei Takagi
Tokyo block	Yoshio Tezuka
Tokyo block	Yoshinori Suematsu
Tokyo block	Akihiro Matsuo
Tokyo block	Ikuo Yamahana
Tokyo block	Jin Matsubara
Tokyo block	Shunsuke Ito
Tokyo block	Yosuke Takagi
Tokyo block	Michiyo Takagi
Tokyo block	Akira Kasai
Tokyo block	Tohru Miyamoto
Tokyo block	Mito Kakizawa
Hokuriku Shin'etsu 19 single-member and 11 proportional representation seats.
Niigata Prefecture
Niigata–1st
Niigata–2nd
Niigata–3rd
Niigata–4th
Niigata–5th
Niigata–6th
Toyama Prefecture
Toyama–1st
Toyama–2nd
Toyama–3rd
Ishikawa Prefecture
Ishikawa–1st
Ishikawa–2nd
Ishikawa–3rd
Fukui Prefecture
Fukui–1st
Fukui–2nd
Nagano Prefecture
Nagano–1st
Nagano–2nd
Nagano–3rd
Nagano–4th
Nagano–5th
Hokuriku Shin'etsu block
Hokuriku Shin'etsu block
Hokuriku Shin'etsu block	Hiroaki Saito
Hokuriku Shin'etsu block	Shunsuke Mutai
Hokuriku Shin'etsu block	Kenichi Hosoda
Hokuriku Shin'etsu block	Koichi Matsudaira
Hokuriku Shin'etsu block	Wakako Yamamoto
Hokuriku Shin'etsu block	Kazuya Kondo
Hokuriku Shin'etsu block	Takeshi Saiki
Hokuriku Shin'etsu block	Masataka Ota
Hokuriku Shin'etsu block	Yasufumi Fujino
Hokuriku Shin'etsu block	Tohru Ishizaki
Tokai 32 single-member and 21 proportional representation seats.
Gifu Prefecture
Gifu–1st
Gifu–2nd
Gifu–3rd
Gifu–4th
Gifu–5th
Shizuoka Prefecture
Shizuoka–1st
Shizuoka–2nd
Shizuoka–3rd
Shizuoka–4th
Shizuoka–5th
Shizuoka–6th
Shizuoka–7th
Shizuoka–8th
Aichi Prefecture
Aichi–1st
Aichi–2nd
Aichi–3rd
Aichi–4th
Aichi–5th
Aichi–6th
Aichi–7th	Shiori Yamao
Aichi–8th
Aichi–9th
Aichi–10th
Aichi–11th
Aichi–12th
Aichi–13th
Aichi–14th
Aichi–15th
Mie Prefecture
Mie–1st
Mie–2nd
Mie–3rd
Mie–4th
Tokai block
Tokai block	Takaaki Katsumata
Tokai block	Junji Suzuki
Tokai block	Shuhei Aoyama
Tokai block	Jiro Kawasaki
Tokai block	Kenji Kanda
Tokai block	Yoshitaka Ikeda
Tokai block	Tetsuya Yagi
Tokai block	Takeru Yoshikawa
Tokai block	Mitsunori Okamoto
Tokai block	Masato Imai
Tokai block	Yoshio Maki
Tokai block	Kenichiro Seki
Tokai block	Kentaro Genma
Tokai block	Tsunehiko Yoshida
Tokai block	Yuta Hiyoshi
Tokai block	Isao Matsuda
Tokai block	Yoshinori Oguchi
Tokai block	Wataru Ito
Tokai block	Nobuko Motomura
Tokai block	Kazumi Sugimoto
Tokai block	Masayuki Aoyama
Kinki 47 single-member and 28 proportional representation seats.
Shiga Prefecture
Shiga–1st
Shiga–2nd
Shiga–3rd
Shiga–4th
Kyoto Prefecture
Kyōto–1st
Kyōto–2nd
Kyōto–3rd
Kyōto–4th
Kyōto–5th
Kyōto–6th
Osaka Prefecture
Ōsaka–1st
Ōsaka–2nd
Ōsaka–3rd
Ōsaka–4th
Ōsaka–5th
Ōsaka–6th
Ōsaka–7th
Ōsaka–8th
Ōsaka–9th
Ōsaka–10th
Ōsaka–11th
Ōsaka–12th			Ishin
Ōsaka–13th
Ōsaka–14th
Ōsaka–15th
Ōsaka–16th
Ōsaka–17th			Ishin
Ōsaka–18th
Ōsaka–19th
Hyogo Prefecture
Hyōgo–1st
Hyōgo–2nd
Hyōgo–3rd
Hyōgo–4th
Hyōgo–5th
Hyōgo–6th
Hyōgo–7th
Hyōgo–8th
Hyōgo–9th
Hyōgo–10th
Hyōgo–11th
Hyōgo–12th
Nara Prefecture
Nara–1st
Nara–2nd
Nara–3rd
Wakayama Prefecture
Wakayama–1st
Wakayama–2nd
Wakayama–3rd
Kinki block
Kinki block	Shinsuke Okuno
Kinki block	Noboru Kamitani
Kinki block	Yukari Sato
Kinki block	Yayoi Kimura
Kinki block	Shohei Okashita
Kinki block	Tom Tanigawa
Kinki block	Hirofumi Kado
Kinki block	Kazuhide Okuma
Kinki block	Mamoru Shigemoto
Kinki block	Hiroyuki Moriyama
Kinki block	Shu Sakurai
Kinki block	Fumiyoshi Murakami
Kinki block	Kanako Otsuji
Kinki block	Hideki Nagao
Kinki block	Sumio Mabuchi
Kinki block	Kazunori Yamanoi
Kinki block	Yuzuru Takeuchi
Kinki block	Tomoko Ukishima
Kinki block	Susumu Hamamura
Kinki block	Yoko Wanibuchi
Kinki block	Keiji Kokuta
Kinki block	Tadashi Shimizu
Kinki block	Natsue Mori
Kinki block	Hidetaka Inoue
Kinki block	Teruo Minobe
Kinki block	Yasushi Adachi
Kinki block	Yasuto Urano
Kinki block	Kazunori Inoue
Chugoku 20 single-member and 11 proportional representation seats.
Tottori Prefecture
Tottori–1st
Tottori–2nd
Shimane Prefecture
Shimane-1st
Shimane-2nd
Okayama Prefecture
Okayama-1st
Okayama-3rd
Okayama-4th
Okayama-5th
Hiroshima Prefecture
Hiroshima-1st
Hiroshima-2nd
Hiroshima-3rd	（Vacant）
Hiroshima-4th
Hiroshima-5th
Hiroshima-6th	Koji Sato
Hiroshima-7th
Yamaguchi Prefecture
Yamaguchi-1st
Yamaguchi-2nd
Yamaguchi-4th	Vacant
Chugoku block
Chugoku block	Toshifumi Kojima
Chugoku block	Mio Sugita
Chugoku block	Michitaka Ikeda
Chugoku block	Keiichi Furuta
Chugoku block	Shogo Azemoto
Chugoku block	Akiko Kamei
Chugoku block	Keisuke Tsumura
Chugoku block	Michiyoshi Yunoki
Chugoku block	Tetsuo Saito
Chugoku block	Keigo Masuya
Chugoku block	Takashi Takai
Shikoku 11 single-member and 6 proportional representation seats.
Tokushima Prefecture
Tokushima-1st
Tokushima-2nd
Kagawa Prefecture
Kagawa-1st
Kagawa-2nd
Kagawa-3rd
Ehime Prefecture
Ehime-1st
Ehime-2nd
Ehime-3rd
Ehime-4th
Kochi Prefecture
Kochi-1st
Kochi-2nd
Shikoku block
Shikoku block	Teru Fukui
Shikoku block	Mamoru Fukuyama
Shikoku block	Yuji Yamamoto
Shikoku block	Junya Ogawa
Shikoku block	Norio Takeuchi
Shikoku block	Noritoshi Ishida
Kyushu 35 single-member and 20 proportional representation seats.
Fukuoka Prefecture
Fukuoka–1st
Fukuoka–2nd
Fukuoka–3rd
Fukuoka–4th
Fukuoka–5th
Fukuoka–6th
Fukuoka–7th
Fukuoka–8th
Fukuoka–9th
Fukuoka–10th
Fukuoka–11th
Saga Prefecture
Saga–1st
Saga–2nd
Nagasaki Prefecture
Nagasaki–1st
Nagasaki–2nd
Nagasaki–3rd
Nagasaki–4th
Kumamoto Prefecture
Kumamoto–1st
Kumamoto–2nd
Kumamoto–3rd
Kumamoto–4th
Oita Prefecture
Ōita–1st
Ōita–2nd
Ōita–3rd
Miyazaki Prefecture
Miyazaki–1st
Miyazaki–2nd
Miyazaki–3rd
Kagoshima Prefecture
Kagoshima–1st
Kagoshima–2nd
Kagoshima–3rd
Kagoshima–4th
Okinawa Prefecture
Okinawa–1st
Okinawa–2nd
Okinawa–3rd
Okinawa–4th
Kyushu Block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block
Kyūshū block

House of Councillors

Composition

List of members by parliamentary group and constituency. There are usually translations and abbreviations for parliamentary groups (会派 kaiha, current House of Councillors website translation: "In-House Group") used on the English pages of the House of Representatives website^[3] The official caucus names^[4] are transcribed to Latin here:

• • • • • • • • • • LDP Kōmeitō CDP DPFP Ishin JCP Reiwa SDP PPPNHK Independents

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.
• The N→S column allows to sort by prefecture from North to South in the order generally used in Japan (also used as number identifier for prefectures [JP-##] in ISO 3166-2).
• Due to a 2015 reapportionment, some districts are represented by an uneven number of members until the regular 2019 election, when it becomes effective in both halves.

Members

Members of the House of Councillors (as of August 3, 2023)^[5]

Name	Caucus	Electoral district	N→S (ISO)	End of term
	L	Proportional		2028
	L	Proportional		2028
	CD	Proportional		2028
	L	Tottori-Shimane		2028
Kenta Aoshima	R-H	Proportional		2028
	L			2028
	L			2025
Ken Akamasu	L	Proportional		2028
	K	Fukuoka		2028
	R-H			2028
	L			2028
Keiichiro Asao	L	Kanagawa		2028
	R-H			2025
	L			2025
Akiko Ikuina	L	Tokyo		2028
	C			2025
Yoshiyuki Inoue	L	Proportional		2028
	C			2025
	K			2028
	PD			2028
	OW			2028
	R-H			2028
	L			2025
	L			2028
	L			2025
	R-H			2028
	CD			2025
	CD			2025
	K			2028
	L			2025
	CD			2028
	L			2028
	PD			2025
Naoki Inose	R-H	Proportional		2028
	L			2028
	L			2028
	C			2028
	L			2025
Isamu Ueda	K	Proportional		2028
	PD			2028
	L			2028
	CD			2025
	R-H			2025
	R-H			2025
Shoichi Usui	L	Chiba		2028
	L			2028
	L			2025
Toshiyuki Ochi	L	Proportional		2028
Kusuo Oshima	R	Proportional		2028
Makoto Oniki	CD	Proportional		2028
	CD			2025
	CD			2025
	L			2028
	I			2025
	L			2028
	PD			2025
Yasutada Ōno	L			2025
	L			2025
	L			2028
Yuko Ohtsubaki	CD	Proportional		2025
	R-H			2025
	L			2025
	PD			2025
	L			2028
	R-H			2028
Daisuke Kajihara	L	Proportional		2028
	CD			2025
Michihito Kaneko	R-H	Proportional		2028
Sohei Kamiya	I	Proportional		2028
Masayuki Kamiya	L	Proportional		2028
	C			2025
Akiyoshi Kato	L	Ibaraki		2028
	PD			2028
	CD			2025
	K			2025
	R			2025
	C			2025
	CD			2025
	L	Yamaguchi		2025
	CD			2025
Tetsuya Kubota	K	Proportional		2028
	C			2025
Seiichi Kushida	R-H	Proportional		2028
	L			2028
	C			2025
	CD			2028
Chikage Koga	CD	Proportional		2028
	L			2025
	CD			2028
Harutomo Kosho	L	Ōita		2028
Kazuhiro Kobayashi	L	Niigata		2028
	L			2025
	K			2025
	L			2028
	L			2025
	L			2025
	CD			2028
Kenichiro Saito	Y	Proportional		2025
	L			2025
	L			2028
	K			2028
	L			2025
	R-H			2025
Aki Shirasaka	L	Ōita		2025
Shin'ichi Shiba	CD	Proportional		2028
	L			2025
	L			2028
	K			2028
	CD			2025
Sohei Nihi	C	Proportional		2028
	R-H			2025
	L			2025
	K			2025
	L			2028
	PD			2025
	I			2025
	L			2028
	K			2025
	CD			2028
	R-H			2025
	L			2025
	L			2028
	CD			2025
	CD			2028
	C			2028
	PD			2025
Mari Takagi	CD	Saitama		2028
	R-H			2028
	L			2025
	L			2025
	K			2025
	OW			2025
	L			2025
	L			2025
	K			2028
Hitoshi Takezume	PD	Proportional		2028
	K			2028
	L			2025
	K			2028
Masashi Tanaka	L	Proportional		2025
Daisuke Tembata	R	Proportional		2028
	I			2025
	L			2025
	L			2028
	L			2025
Kiyomi Tsujimoto	CD	Proportional		2028
	PD			2028
Rio Tomonoh	L	Proportional		2028
	L			2025
	I			2025
Makiko Dogomi	I	Ibaraki		2028
Hiroshi Nakada	L	Proportional		2028
	L			2028
Manabu Nagai	L	Yamanashi		2028
Kiyoshi Nakajo	R-H	Proportional		2028
	L			2028
vacant		Tokushima-Kōchi		2025
	I			2025
	L			2025
	K			2025
	L			2025
	K			2028
	L			2028
	CD			2025
	L			2028
	CD			2025
	L			2025
	PD			2025
	L			2025
	L			2025
	PD			2028
	Y			2025
Gaku Hasegawa	L	Hokkaidō		2028
Hideharu Hasegawa	L	Proportional		2028
	PD			2025
Natsumi Higa	L	Proportional		2025
	K			2025
	I			2028
Megumi Hirose	L	Iwate		2028
	L			2028
	CD			2028
	CD			2028
	L			2028
	L			2028
Toshimitsu Funahashi	L	Hokkaidō		2028
	PD			2028
	R			2025
	L			2025
Kazuhiro Fujii	L	Proportional		2028
	L			2025
	L			2025
Hokuto Hoshi	L	Fukushima		2028
	L			2025
	L			2025
	CD			2025
Akemi Matsuno	R-H	Proportional		2028
	L			2028
	R-H			2025
	L			2028
	L			2028
	L			2025
	L			2025
Eri Mikami	CD	Hiroshima		2028
	K			2028
	L			2025
	L			2028
	L			2025
Motoko Mizuno	CD	Kanagawa		2028
	CD			2025
	CD			2025
	L			2025
	K			2028
	L			2028
	L	Ishikawa		2025
	R-H			2025
	L			2025
	CD			2025
	CD			2025
	L			2025
Kyoko Murata	CD	Proportional		2028
	K			2025
	K			2025
	R-H			2025
	K			2025
	L			2028
	L			2025
	C			2025
	C			2028
	L			2025
	L			2025
	L			2028
	L			2028
	K			2025
	L			2028
	K			2025
Taro Yamamoto	R	Tokyo		2028
Sachiko Yamamoto	L	Mie		2028
Keisuke Yamamoto	L	Nagasaki		2028
	CD			2025
	K			2028
	CD			2025
	L			2025
Akira Yoshii	L	Kyoto		2028
	CD			2028
	L			2025
	K			2025
	L			2028
Yohei Wakabayashi	L	Shizuoka		2028

External links

• Web site: Composition of the House of Representatives . August 5, 2016.
• Web site: List of the Members of the House of Councillors . August 5, 2016.

See also

• Member of Parliament (Japan)

Notes and References

1. House of Representatives: Strength of Political Groups in the House of Representatives
2. House of Representatives: List of members, List of parliamentary groups, List of members by parliamentary group
3. House of Councillors: Strength of the Political Groups in the House of Councillors
4. http://www.sangiin.go.jp/japanese/joho1/kousei/giin/kaiha/kaiha196.htm List of caucuses
5. House of Councillors: List of caucuses and membership totals, List of members, List of members by district and in the proportional district: by caucus (Japanese); English list of members (by caucus, does not list electoral district or end of term)