Japan House of Councillors constituency
TheHokkaido at-large district is a constituency of theHouse of Councillors in theDiet of Japan (national legislature). It consists of the prefecture(dō) ofHokkai[dō] and is represented by six Councillors electing three at a time every three years bysingle non-transferable vote for six-year terms. In the election period from 2025 to 2028, Hokkaido's Councillors are (party affiliation as of January 2026):
After the House of Councillors had replaced the House of Peers according to the constitution of 1947, Hokkaido was represented by eight Councillors. In the early years of the1955 System , all four seats went to the two major postwar parties, theLiberal Democratic Party (LDP) and theJapan Socialist Party (JSP). But smaller parties such as theJapanese Communist Party (JCP) had a chance to pick up seats in Hokkaido as the vote share sufficient to gain a seat was often significantly below 20 percent. The high number of candidates increased the risk ofvote splitting for the major parties: In 1974, two incumbent LDP candidates and conservative independent Tatsuo Takahashi ranked 5th, 6th and 7th leaving all four seats to the center-left to left opposition parties Kōmeitō, JSP and JCP.
In a major reapportionment in 1994 the number of Councillors from Hokkaido was halved to four. It became effective in the 1995 and 1998 elections. During the period as two-member district, Hokkaidō usually split seats evenly between opposition and ruling parties like most two-member districts – although the Democrats unsuccessfully aimed for both seats in the 2004, 2007 and 2010 elections. In another 2015 reapportionment, effective in the two classes from the 2016 and 2019 elections, Hokkaidō's representation in the upper house was raised to six.
Elected Councillors [ edit ] Class of 1947 Election year Class of 1950 #1(1947: #1, 6-year term) (1950: #5, 3-year term) #2(1947: #2, 6-year term) #3(1947: #3, 6-year term) #4(1947: #4, 6-year term) #1(1947: #5, 3-year term) #2(1947: #6, 3-year term) #3(1947: #7, 3-year term) #4(1947: #8, 3-year term) Junsuke Itaya †JLP )Sueji Hori Makoto Chiba JSP )Misao Kaga [ party 1] 1947 [ 2] Katsuzō Wakaki [ party 2] Gengo Kinoshita JSP )Keiki Machimura [ party 3] Yonesaburō Kobayashi [ party 4] Eiji Arima DP )1950 incl. by-election [ 3] Gengo KinoshitaJSP ) Takashi AzumaFarmers Cooperative Party ) Katsuzō WakakiJSP ) Sadayoshi Matsuura Farmers Cooperative Party )Makoto ChibaJSP, left ) Katsutarō Kita [ party 5] Sueji HoriYoshida LP ) Eiji ArimaProgressive ) 1953 [ 4] 1956 [ 5] Hidetoshi Tomabechi LDP )Tadashi Ōya JSP )Takashi AzumaJSP ) Shinichi Nishida LDP )Isao Yoneta JSP )Sueji HoriLDP ) Ihei Ikawa LDP )Makoto ChibaJSP ) 1959 [ 6] 1962 [ 7] Tadashi ŌyaJSP ) Tokuichi Kobayashi [ party 6] Chūzaburō Yoshida JSP )Seiichi Kawamura JSP )Ihei IkawaLDP ) Yūnosuke Takahashi LDP )Genshō Takeda JSP )1965 [ 8] 1968 [ 9] Yōichi Kawaguchi LDP )Shinichi NishidaLDP ) Chūzaburō YoshidaJSP ) Yūnosuke TakahashiLDP ) Seiichi KawamuraJSP ) Genshō TakedaJSP ) Masaichi Iwamoto LDP )1971 [ 10] 1974 [ 11] Sadako Ogasawara JCP )Chūzaburō YoshidaJSP ) Takakatsu Tsushima JSP )Takehiko Aizawa Kōmeitō )Shūji Kita LDP )Keiichi Nakamura LDP )Kaneyasu Marutani JSP )Seiichi KawamuraJSP ) 1977 [ 12] 1980 [ 13] Masaaki Takagi LDP )Masamitsu Iwamoto LDP )Sadako OgasawaraJCP ) Hisamitsu Sugano JSP )Masami Kudō LDP )1983 [ 14] 1986 [ 15] Takakatsu Tsushima JSP )Masaaki TakagiLDP ) Yasuko Takemura [ party 7] Shūji KitaLDP ) Yūko Takasaki JCP )1989 [ 16] 1992 [ 17] Hisashi Kazama Kōmeitō )Noriyuki Nakao [ party 8] Naoki Minezaki JSP )Masaaki TakagiLDP ) Hisamitsu SuganoJSP ) Katsuya Ogawa NFP )– 1995 [ 18] 1998 [ 19] Naoki MinezakiDPJ ) Yoshio Nakagawa LDP )– Chūichi Date LDP )Katsuya OgawaDPJ ) 2001 [ 20] 2004 [ 21] Yoshio NakagawaLDP ) Naoki MinezakiDPJ ) Katsuya OgawaDPJ ) Chūichi DateLDP ) 2007 [ 22] 2010 [ 23] Gaku Hasegawa LDP )Eri Tokunaga DPJ )Chūichi DateLDP ) Katsuya OgawaDPJ ) 2013 [ 24] 2016 [ 25] Eri Tokunaga DP )Yoshio Hachiro DP )– Harumi Takahashi LDP )Kenji Katsube CDP )Tsuyohito Iwamoto LDP )– 2019 [ 26] 2022 [ 27] Eri Tokunaga CDP )Toshimitsu Funahashi LDP )2025 [ 28]
^ joinedRyokufūkai ^ joined JSP ^ joined Ryokufūkai ^ joined JLP ^ joined Ryokufūkai ^ joined LDP ^ JSP support ^ JSP support Recent election results [ edit ] Notes:
Decimals from anbunhyō ("fractional proportional votes" from ambiguous votes) omitted; note that the rounded whole numbers may still include fractions of numbers >2 of ambiguous votes and do not necessarily represent "whole" voters Change in vote is between each election not between last time candidate contested. Elections in the 2020s [ edit ] 2025 : Hokkaido at-large3 seats [ 29] Party Candidate Votes % ±% LDP Harumi Takahashi 546,118 21.51 CDP (Social Democratic )Kenji Katsube 501,081 19.73 LDP (Komeito )Tsuyohito Iwamoto 333,558 13.14 Sanseitō Yoshito Tanaka 325,070 12.80 DPP Masaki Suzuki 324,272 12.77 JCP Shiori Miyauchi 147,880 5.82 Reiwa Kazutaka Nomura Paterson 139,301 5.49 new CPJ Masaru Onodera 112,076 4.41 new Ishin Miwako Okada 56,253 2.22 new Team Mirai Muneyoshi Inahara 33,038 1.30 new Anti-NHK Tomoko Gotō 13,144 0.52 new Japan Reform Party Yasuji Takasugi 7,420 0.29 new Turnout 59.69 Registered electors 4,364,914 Party total seats Won Total Change Liberal Democratic 2 4 Constitutional Democratic 1 2 Total 3 6 N/A
2022 : Hokkaido at-large3 seats [ 30] Party Candidate Votes % ±% LDP (Komeito )Gaku Hasegawa 595,033 25.45 CDP (Social Democratic )Eri Tokunaga 455,057 19.47 LDP (Komeito )Toshimitsu Funahashi 447,232 19.13 CDP (Reiwa )Tomohiro Ishikawa 422,392 18.07 new JCP Kazuya Hatayama 163,252 6.98 DPP Hidetake Usuki 91,127 3.90 Sanseitō Kotaro Ohmura 75,299 3.22 new Anti-NHK Tadayuki Saito 23,039 0.99 Anti-NHK Yoshie Ishii 18,831 0.81 Anti-NHK Satoshi Hamada 18,760 0.80 New Party Kunimori Eiichi Sawada 16,006 0.68 new Happiness Realization Yoshinori Moriyama 11,625 0.50 Turnout 53.98 Registered electors 4,465,576 Party total seats Won Total Change Liberal Democratic 2 4 Constitutional Democratic 1 2 Total 3 6 N/A
Elections in the 2010s [ edit ] 2019 : Hokkaido at-large3 seats [ 26] Party Candidate Votes % ±% LDP Harumi Takahashi 828,220 34.36 CDP Kenji Katsube 523,737 21.73 new LDP Tsuyohito Iwamoto 454,285 18.85 JCP Kazuya Hatayama 265,862 11.03 DPP Nami Haraya 227,174 9.43 new Anti-NHK Takahira Yamamoto 63,308 2.63 new CES Osamu Nakamura 23,785 0.99 Happiness Realization Yoshinori Moriyama 13,724 0.57 Workers Party Aiming for Liberation of Labour Seiji Iwase 10,108 0.42 new Turnout 53.76 Registered electors 4,560,237 Party total seats Won Total Change Liberal Democratic 2 4 Constitutional Democratic 1 3 Total 3 6
2016 : Hokkaido at-large3 seats [ 25] Party Candidate Votes % ±% LDP Gaku Hasegawa 648,269 25.47 Democratic Eri Tokunaga 559,996 22.00 Democratic Yoshio Hachiro 491,129 19.29 new LDP Katsuhiro Kakiki 482,688 18.96 new JCP Tsuneto Mori 239,564 9.41 Japanese Kokoro Kazuo Satō 34,092 1.34 new Shiji Seitō Nashi Osamu Nakamura 29,072 1.14 new Independent Yoshihiro Iida 26,686 1.05 new Happiness Realization Yoshinori Moriyama 21,006 0.83 Independent Kan'yō Mizukoshi 12,944 0.51 new Turnout 56.78 Registered electors 4,613,374 Party total seats Won Total Change Democratic 2 3 LDP 1 2 Total 3 5
2010 : Hokkaido at-large2 seats [ 23] Party Candidate Votes % ±% LDP Gaku Hasegawa 948,267 34.27 Democratic Eri Tokunaga 708,523 25.60 Democratic Masashi Fujikawa 567,167 20.49 new Your Ken'ichi Nakagawa 320,992 11.60 new JCP Kazuya Hatayama 200,231 7.24 Happiness Realization Makoto Ōbayashi 22,166 0.80 new Turnout 2,849,955 61.89[ 31] Registered electors 4,604,561 Party total seats Won Total Change Liberal Democratic 1 2 Democratic 1 2 Total 2 4 N/A
Elections in the 2000s [ edit ] 2007 : Hokkaido at-large2 seats [ 22] Party Candidate Votes % ±% Democratic Katsuya Ogawa 1,018,597 36.03 LDP Chūichi Date 757,463 26.79 Independent (NP-Daichi )Kaori Sahara 621,497 21.98 new JCP Kazuya Hatayama 206,463 7.30 Independent Hideyoshi Hashiba 103,282 3.65 new Social Democratic Takao Asano 79,474 2.81 Independent Masayuki Arakawa 22,154 0.78 new Ishin Seito Shimpu Nobuhito Sendai 18,234 0.64 Turnout 2,907,079 62.40[ 32] Registered electors 4,658,649 Party total seats Won Total Change Democratic 1 2 Liberal Democratic 1 2 Total 2 4 N/A
2001 : Hokkaido at-large2 seats [ 20] Party Candidate Votes % ±% LDP Chūichi Date 985,274 39.26 Democratic Katsuya Ogawa 683,704 27.24 JCP Satoshi Miyauchi 284,575 11.34 Liberal Masahito Nishikawa 196,348 7.82 Social Democratic Yoshiko Sugiyama 165,670 6.60 Women's Party Tamiko Matsumura 87,597 3.49 new Independent Mitsuhiro Yokoyama 36,119 1.44 new Liberal League Akifumi Kumagai 33,500 1.33 New Socialist Nobuyuki Saitō 25,261 1.01 new Ishin Seito Shimpu Nobuhito Sendai 11,469 0.46 Turnout 58.47 Registered electors 4,623,468 Party total seats Won Total Change Liberal Democratic 1 2 Democratic 1 3 Socialist 0 0 New Frontier 0 0 [ a] Total 2 4 N/A
Elections in the 1990s [ edit ] 1998 : Hokkaido at-large2 seats [ 19] Party Candidate Votes % ±% Democratic Naoki Minezaki 804,611 31.22 new LDP Yoshio Nakagawa 723,786 28.08 JCP Tomoko Uchiyama 605,119 23.48 Liberal Kentarō Ono 161,505 6.27 new Social Democratic (NP-Sakigake )Shirō Kayano 146,159 5.67 new New Socialist Masami Mizuyoshi 34,374 1.33 new Youth Liberal Party Ken'ichi Sawada 33,390 1.30 new Liberal League Ryōko Matsukawa 32,557 1.26 new Independent Hideo Murata 28,480 1.11 new Ishin Seito Shimpu Nobuhito Sendai 7,249 0.28 new Turnout 59.9 Registered electors 4,523,366 Party total seats Won Total Change Democratic Party 1 3 new Liberal Democratic 1 1 Kōmeitō 0 0 Independent 0 0 Total 2 4
Elections in the 1980s [ edit ] 1986 : Hokkaido at-large4 seats [ 35] Party Candidate Votes % ±% Socialist Takakatsu Tsushima 640,834 22.58 LDP Masamitsu Iwatomo 583,457 20.56 LDP Masaaki Takagi 575,105 20.26 JCP Sadako Ogasawara 495,254 17.45 Independent (Socialist )Hiroshi Tsuchida 462,999 16.31 new Greens Fusako Nogami 33,504 1.18 new Socialist Workers' Party Junji Gōda 24,539 0.86 new Independent Rihei Tōbe 22,277 0.78 new Turnout 74.04 Registered electors 4,071,178 Party total seats Won Total Change Liberal Democratic 2 4 Socialist 1 3 Communist 1 1 Total 4 8 N/A
Elections in the 1970s [ edit ] 1977 : Hokkaido at-large4 seats [ 38] Party Candidate Votes % ±% LDP Shūji Kita 544,725 20.29 LDP Keiichi Nakamura 492,365 18.34 Socialist Kaneyasu Marutani 424,686 15.82 Socialist Seiichi Kawamura 346,111 12.89 Kōmeitō Yoshio Koito 324,520 12.09 New Liberal Club Yoshinori Bandō 314,726 11.72 new JCP Kenji Kodama 229,416 8.54 Independent Hiromitsu Asanuma 4,663 0.17 new Independent Masahiro Azuma 3,627 0.14 new Turnout 73.67 Registered electors 3,710,790
^ NFP merged into the DPJ, with Katsuya Ogawa retaining the seat he won previously under NFP ^ endorsed bySeirankai [jp ] , a faction of the LDP, following internal disagreements over the nomination of the two incumbents[ 40] ^ "総務省｜令和4年9月1日現在選挙人名簿及び在外選挙人名簿登録者数" [Ministry of Internal Affairs and Communications - Number of registered voters as of 1 September 2022] (in Japanese). Retrieved2023-01-04 .^ 参議院>第1回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第2回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第3回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第4回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第5回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第6回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第7回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第8回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第9回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第10回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese).JANJAN . Retrieved2010-05-09 .^ 参議院>第11回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第12回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第13回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第14回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第15回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^ 参議院>第16回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第17回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第18回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第19回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第20回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第21回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参議院>第22回参議院議員選挙>北海道選挙区 senkyo.janjan.jp ザ･選挙 (in Japanese). Heartbeats. Retrieved2013-04-03 .^a b 参院選2013>選挙結果>選挙区>北海道 Yomiuri Shimbun . Retrieved2013-07-22 .^a b Yomiuri Online , House of Councillors election 2016:Results in Hokkaidō ^a b NHK , House of Councillors election 2019:Results in Hokkaidō ^ NHK , House of Councillors election 2022:Results in Hokkaidō ^ NHK , House of Councillors election 2025:Results in Hokkaidō ^ "北海道選挙区 - 第27回参議院議員選挙 2025年（参議院議員通常選挙）2025年07月20日投票 ｜ 選挙ドットコム" .選挙ドットコム (in Japanese). Retrieved2025-07-24 .^ "北海道 参議院選挙結果・開票速報 参院選2022 - NHK" .NHK . Retrieved20 July 2025 .^ Hokkaidō government, electoral commission:past election results ,22rd regular election of the House of Councillors ,turnout ^ Hokkaidō government, electoral commission:past election results ,21st regular election of the House of Councillors ,turnout ^ "北海道選挙区 - 第16回参議院議員選挙（参議院議員通常選挙）1992年07月26日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 16th House of Councillors Election Results].選挙ドットコム (in Japanese). Retrieved2025-07-28 .^ "北海道選挙区 - 第15回参議院議員選挙（参議院議員通常選挙）1989年07月23日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 15th House of Councillors Election Results].選挙ドットコム (in Japanese). Retrieved2025-07-28 .^ "北海道選挙区 - 第14回参議院議員選挙（参議院議員通常選挙）1986年07月06日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 14th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-28 .^ "北海道選挙区 - 第13回参議院議員選挙（参議院議員通常選挙）1983年06月26日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 13th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-28 .^ "北海道選挙区 - 第12回参議院議員選挙（参議院議員通常選挙）1980年06月22日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 12th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-28 .^ "北海道選挙区 - 第11回参議院議員選挙（参議院議員通常選挙）1977年07月10日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 11th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-31 .^ "北海道選挙区 - 第10回参議院議員選挙（参議院議員通常選挙）1974年07月07日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 10th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-31 .^ "世代交代のきっかけとなった"辰ちゃん"の参院選" .武部勤が語る (in Japanese). Archived fromthe original on 2007-10-13. Retrieved2025-07-31 .^ "北海道選挙区 - 第9回参議院議員選挙（参議院議員通常選挙）1971年06月27日投票 ｜ 選挙ドットコム" [Hokkaido at-large constituency - 9th House of Councillors election results].選挙ドットコム (in Japanese). Retrieved2025-07-31 .
SNTV "medium-sized" districts (1947–1993)1 2 3 4 5 (22→23 Representatives, 8→4 Councillors)SNTV "medium-sized" districts (1928–1942) 1 2 3 4 5 (20 Representatives)FPTP/SNTV "small" districts (1920–1924) 1 2 3 4 5 6 7 8 9 10 11 12 (16 Representatives)
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