Ibaraki at-large district

The Ibaraki at-large district (Japanese: 茨城県選挙区, Hepburn: Ibaraki-ken senkyoku) is a constituency that represents Ibaraki Prefecture in the House of Councillors in the Diet of Japan. It has four Councillors in the 248-member house.

PrefectureIbaraki

Electorate2,362,192^[1]

Created1947

Seats4

Quick facts Prefecture, Electorate ...

Ibaraki at-large district
茨城県選挙区
Parliamentary constituency for the House of Councillors

Prefecture	Ibaraki
Electorate	2,362,192^[1]
Current constituency
Created	1947
Seats	4
Councillors	Class of 2028: Akiyoshi Katō (LDP) Makiko Dōgomi (DPFP) Class of 2031: Ryōsuke Kōzuki (LDP) Shoko Sakurai (Sanseitō)

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Outline

The constituency represents the entire population of Ibaraki Prefecture. The district elects four Councillors to six-year terms, two each at alternating elections held every three years. The district has 2,362,192 registered voters as of July 2025.^[1] The Councillors currently representing Ibaraki are:

Akiyoshi Katō (Liberal Democratic Party (LDP), first term; term ends in 2028)^[2]
Makiko Dōgomi (Democratic Party For the People (DPFP), first term; term ends in 2028)^[3]
Ryōsuke Kōzuki (LDP, third term; term ends in 2031)^[4]
Shoko Sakurai (Sanseitō, first term; term ends in 2031)^[5]

Elected Councillors

More information Class of 1947, Election year ...

Class of 1947		Election year	Class of 1950 (3-year term in 1947)
Yasuji Yūki (Ind.)^{[note 1]}	Masaji Shibata (Liberal)^{[note 2]}	1947	Nobuo Ōhata (Social Democratic)	Tsuneo Ikeda (Ind.)^{[note 3]}
	Masaji Shibata (Liberal)^{[note 2]}	1950	Yūichi Kōri (Liberal)	Shichihei Kikuta (National Democratic)
	Shigefumi Miyata (Liberal)	1950 by-election^{[note 4]}
Tsunesuke Mutō (Kaishintō)		1953
Tsunesuke Mutō (Kaishintō)		1956	Yūichi Kōri (LDP)	Motojiro Mori (Social Democratic)
Tsunesuke Mutō^{[note 5]} (LDP)	Sōzō Ōmori (Social Democratic)	1959
Tsunesuke Mutō^{[note 5]} (LDP)		1962
Ichiji Suzuki (LDP)		1963 by-election^{[note 6]}
Kishirō Nakamura^{[note 7]} (LDP)		1965
		1968
	Fujio Takeuchi^{[note 8]} (LDP)	1971
Tomi Nakamura (Minor party)^{[note 9]}		1972 by-election^{[note 10]}
		1974	Taeko Iwakami^{[note 11]} (Minor party)^{[note 12]}	Osamu Yatabe (Social Democratic)
	Yūichi Kōri (LDP)	1975 by-election^{[note 13]}
Michitada Takasugi (Social Democratic)		1977
		^{[note 14]}1978 by-election	Nirō Iwakami^{[note 15]} (LDP)
		1980
	Ikuo Soneda (LDP)	1983
	Ikuo Soneda (LDP)	1986
Makoto Taneda (Social Democratic)	Akio Kanō^{[note 16]} (LDP)	1989
	Akio Kanō^{[note 16]} (LDP)	^{[note 17]}1989 by-election	Itsuo Nomura (LDP)
	Yasu Kanō^{[note 18]} (LDP)	1992 by-election^{[note 19]}
		1992
Moto Kobayashi (New Frontier)		1995
Moto Kobayashi (New Frontier)		1998	Kōichi Kuno^{[note 20]} (LDP)	Akira Gunji (DPJ)
Moto Kobayashi (DPJ)		2001	Kōichi Kuno^{[note 20]} (LDP)
		2003 by-election^{[note 21]}	Hiroshi Okada (LDP)
		2004^[10]
Yukihisa Fujita (DPJ)	Tamon Hasegawa (LDP)	2007^[11]
	Tamon Hasegawa (LDP)	2010^[12]
	Ryōsuke Kōzuki (LDP)	2013^[13]
		2016^[14]		Akira Gunji (DP)
Takumi Onuma (CDP)		2019^[15]		Akira Gunji (DP)
Takumi Onuma (CDP)		2022^[16]	Akiyoshi Katō (LDP)	Makiko Dōgomi (Ind.)^{[note 22]}
Shoko Sakurai (Sanseitō)		2025^[1]	Akiyoshi Katō (LDP)	Makiko Dōgomi (Ind.)^{[note 22]}

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[1]
Later joined Ryokufūkai^[6]
[2]
Died in office 15 September 1950^[7]
[3]
Later joined the Labourers and Farmers Party^[7]
[4]
Held 3 November 1950^[6]
[5]
Died in office 6 August 1963^[6]
[6]
Held 18 September 1963^[7]
[7]
Died in office 21 December 1971^[8]
[8]
Resigned 14 March 1975^[8]
[9]
Wife of the deceased Kishirō Nakamura. Ran as a candidate of a minor party,^[9] but later joined the LDP^[8]
[10]
Held 6 February 1972^[8]
[11]
Resigned 21 December 1977^[7]
[12]
Elected as a candidate for the Ibaraki Agricultural Federation. Later joined the LDP^[7]
[13]
Held 27 April 1975^[7]
[14]
Held 5 February 1978^[7]
[15]
Husband of Taeko Iwakami. Died in office 16 August 1989^[7]
[16]
Died in office 26 February 1992^[7]
[17]
Held 1 October 1989^[7]
[18]
Wife of Akio Kanō
[19]
Held 12 April 1992^[9]
[20]
Died in office 17 October 2002
[21]
Held 27 April 2003^[9]
[22]
Joined Democratic Party For the People in December 2025^[17]