# Nagasaki at-large district

The Nagasaki at-large district (長崎県選挙区, Nagasaki-ken Senkyo-ku) is a constituency of the House of Councillors in the Diet of Japan. It consists of Nagasaki Prefecture and elects two Councillors, one every three years by a first-past-the-post system for a six-year term. In the first election in 1947, Nagasaki like all districts used single non-transferable vote to elect both its Councillors in one election. Similar to other small, rural Kyushu prefectures, it is a "conservative kingdom" in favor of the LDP. Since the Democratic Party folded, LDP candidates have consistently won with over 50% of the vote.
Single-member districts (ichinin-ku) for the House of Councillors often play a decisive role for the outcome of elections as little swing in votes is required to achieve a change of the Councillors elected there. Under the 1955 System Nagasaki voted consistently for conservative candidates until the landslide election of 1989 that led to a "twisted parliament" (nejire kokkai: opposition control of the House of Councillors). Following the party realignments of the 1990s when reformist conservative and liberal parties and ultimately the Democratic Party replaced the Socialists as the main opposition to the LDP, Nagasaki became a more closely contested potential swing district.

## Elected Councillors

| class of 1947 | election year | class of 1950 |
| #1 (1947: #1, 6-year term) | election year | #1 (1947: #2, 3-year term) |
| Shigeo Fujino (Indep.) | 1947 | Takeo Shimizu (JSP) † |
| Shigeo Fujino (Indep.) | 1948 by-el. | Moriichi Kadoya (DP) |
| Shigeo Fujino (Indep.) | 1950 | Shun'ichirō Akiyama (LP) |
| Shigeo Fujino (Yoshida LP) | 1953 | Shun'ichirō Akiyama (LP) |
| Shigeo Fujino (Yoshida LP) | 1956 | Shun'ichirō Akiyama (LDP) |
| Shigeo Fujino (LDP) | 1959 | Shun'ichirō Akiyama (LDP) |
| Shigeo Fujino (LDP) | 1962 | Kan'ichi Kubo (LDP) # |
| Naozō Taura (LDP) † | 1965 | Kan'ichi Kubo (LDP) # |
| Tatsuhiko Tatsuta (JSP) | w/o vote | Kan'ichi Kubo (LDP) # |
| Tatsuhiko Tatsuta (JSP) | 1968 | Kan'ichi Kubo (LDP) # |
| Tatsuhiko Tatsuta (JSP) | 1970 by-el. | Takiichirō Hatsumura (LDP) |
| Teiji Nakamura (LDP) | 1971 | Takiichirō Hatsumura (LDP) |
| Teiji Nakamura (LDP) | 1974 | Takiichirō Hatsumura (LDP) |
| Teiji Nakamura (LDP) | 1977 | Takiichirō Hatsumura (LDP) |
| Teiji Nakamura (LDP) | 1980 | Takiichirō Hatsumura (LDP) |
| Hiroshi Miyajima (LDP) | 1983 | Takiichirō Hatsumura (LDP) |
| Hiroshi Miyajima (LDP) | 1986 | Takiichirō Hatsumura (LDP) |
| Toshiko Shinozaki (JSP) | 1989 | Takiichirō Hatsumura (LDP) |
| Toshiko Shinozaki (JSP) | 1992 | Sōichirō Matsutani (LDP) |
| Tadashi Taura (NFP) | 1995 | Sōichirō Matsutani (LDP) |
| Tadashi Taura (NFP) | 1998 | Sōichirō Matsutani (LDP) |
| Tadashi Taura (LDP) | 2001 | Sōichirō Matsutani (LDP) |
| Tadashi Taura (LDP) | 2004 | Tadashi Inuzuka (DPJ) |
| Yukishige Ōkubo (DPJ) | 2007 | Tadashi Inuzuka (DPJ) |
| Yukishige Ōkubo (DPJ) | 2010 | Genjirō Kaneko (LDP) |
| Yuichiro Koga (LDP) | 2013 | Genjirō Kaneko (LDP) |
| Yuichiro Koga (LDP) | 2016 | Genjirō Kaneko (LDP) |
| Yuichiro Koga (LDP) | 2019 | Genjirō Kaneko (LDP) |
| Yuichiro Koga (LDP) | 2022 | Keisuke Yamamoto (LDP) |
#: resigned to contest the 1970 Nagasaki gubernatorial election; †: died in office

## Election Results

2022 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Keisuke Yamamoto (Endorsed by the Komeito) | 261,554 | 50.1 | |
| | Constitutional Democratic | Ayumi Shirakawa (Endorsed by the SDP) | 152,473 | 29.2 | |
| | Ishin | Mami Yamada | 53,715 | 10.3 | |
| | Communist | Ayako Yasue | 26,281 | 5.0 | |
| | Sanseitō | Ayako Ogata | 21,363 | 4.1 | |
| | Anti-NHK | Kazuto Okuma | 6,969 | 1.3 | |
| Turnout | Turnout | Turnout | 522,355 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2019 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Yuichiro Koga (Incumbent) (Endorsed by Komeito) | 258,109 | 51.5 | |
| | Democratic Party for the People | Ayumi Shirakawa (Endorsed by the JCP and the SDP) | 224,022 | 44.7 | |
| | Anti-NHK | Kotaro Kamiya | 19,240 | 3.8 | |
| Turnout | Turnout | Turnout | 501,371 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2016 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Genjiro Kaneko (Incumbent) | 336,612 | 52.9 | |
| | Democratic | Hideko Nishioka | 285,743 | 44.9 | |
| | Happiness Realization | Masatoshi Enatsu | 13,936 | 2.2 | |
| Turnout | Turnout | Turnout | 636,291 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
2013 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Yuichiro Koga | 359,805 | 59.2 | |
| | Democratic | Yukishige Okubo | 186,402 | 30.7 | |
| | Communist | Toshihiko Haraguchi | 45,683 | 7.5 | |
| | Happiness Realization | Kiyoto Yamada | 15,586 | 2.6 | |
| Turnout | Turnout | Turnout | 607,476 | | |
| | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic |
2010 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Genjiro Kaneko | 344,182 | 48.8 | |
| | Democratic | Tadashi Inuzuka (Incumbent) | 272,043 | 38.6 | |
| | Your | Norihiko Nakashima | 60,829 | 8.6 | |
| | Communist | Eiko Fuchise | 28,614 | 4.0 | |
| Turnout | Turnout | Turnout | 705,668 | | |
| | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic | Liberal Democratic gain from Democratic |
2007 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Yukishige Okubo | 352,953 | 49.0 | |
| | Liberal Democratic | Tadashi Komine | 331,147 | 46.0 | |
| | Communist | Eiko Fuchise | 35,837 | 5.0 | |
| Turnout | Turnout | Turnout | 719,937 | | |
| | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic |
2004 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Tadashi Inuzuka | 344,606 | 49.5 | |
| | Liberal Democratic | Soichiro Matsutani (Incumbent) | 303,723 | 43.7 | |
| | Communist | Toshihiko Haraguchi | 47,457 | 6.8 | |
| Turnout | Turnout | Turnout | 695,786 | | |
| | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic | Democratic gain from Liberal Democratic |
2001 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Tadashi Taura | 356,934 | 53.4 | |
| | Independent | Yuji Mitsuno | 195,670 | 29.3 | |
| | Independent | Kotaro Tanaka | 46,199 | 6.9 | |
| | Communist | Kimiko Ogawa | 44,262 | 6.6 | |
| | Women's Party | Sachiko Matsumoto | 25,265 | 3.8 | |
| Turnout | Turnout | Turnout | 668,330 | | |
| | Liberal Democratic gain from New Frontier | Liberal Democratic gain from New Frontier | Liberal Democratic gain from New Frontier | Liberal Democratic gain from New Frontier | Liberal Democratic gain from New Frontier |
1998 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Soichiro Matsutani (Incumbent) | 271,607 | 42.1 | |
| | Independent | Yuji Mitsuno | 244,733 | 37.9 | |
| | Communist | Kieko Nishimura | 84,646 | 13.1 | |
| | Liberal League | Kazuko Teraoka | 44,807 | 6.9 | |
| Turnout | Turnout | Turnout | 645,793 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1995 :
| Party | Party | Candidate | Votes | % | ±% |
| | New Frontier | Tadashi Taura | 174,017 | 30.6 | |
| | Liberal Democratic | Daisuke Miyajima | 165,387 | 29.1 | |
| | Independent | Kuro Matsuda | 98,447 | 17.3 | |
| | Socialist | Ryuichi Sato | 96,081 | 16.9 | |
| | Communist | Kieko Nishimura | 34,032 | 6.0 | |
| Turnout | Turnout | Turnout | 567,964 | | |
| | New Frontier gain from Socialist | New Frontier gain from Socialist | New Frontier gain from Socialist | New Frontier gain from Socialist | New Frontier gain from Socialist |
1992 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Soichiro Matsutani | 320,060 | 55.0 | |
| | Democratic Reform Party | Yuji Hagi | 206,611 | 35.5 | |
| | Communist | Satoru Ishikawa | 55,621 | 9.6 | |
| Turnout | Turnout | Turnout | 582,292 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1989 :
| Party | Party | Candidate | Votes | % | ±% |
| | Socialist | Toshiko Shinozaki | 344,416 | 44.9 | |
| | Liberal Democratic | Akira Miyajima | 238,511 | 31.1 | |
| | Independent | Soichiro Matsutani | 151,053 | 19.7 | |
| | Communist | Satoru Ishikawa | 30,134 | 3.9 | |
| | Nihon Seinensha | Koichi Hachiya | 3,835 | 0.5 | |
| Turnout | Turnout | Turnout | 767,949 | | |
| | Socialist gain from Liberal Democratic | Socialist gain from Liberal Democratic | Socialist gain from Liberal Democratic | Socialist gain from Liberal Democratic | Socialist gain from Liberal Democratic |
1986 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Takichiro Hatsumara | 409,065 | 49.2 | |
| | Socialist | Kai Hayami | 200,385 | 24.1 | |
| | Independent | Goro Asada | 174,896 | 21.0 | |
| | Communist | Yasushi Tanaka | 47,113 | 5.7 | |
| Turnout | Turnout | Turnout | 831,459 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1983 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Akira Miyajima | 325,733 | 55.9 | |
| | Socialist | Kenji Taguchi | 210,483 | 36.1 | |
| | Communist | Yasushi Tanaka | 46,136 | 7.9 | |
| Turnout | Turnout | Turnout | 582,352 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1980 :
| Party | Party | Candidate | Votes | % |
| | Liberal Democratic | Takiichiro Hatsumura | 452,561 | 58.3 |
| | Socialist | Tatsuhiko Tatsuta | 267,786 | 34.5 |
| | Communist | Yasuo Furuki | 55,376 | 7.1 |
| Turnout | Turnout | Turnout | 775,723 | |
1977 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Teiji Nakamura (Incumbent) | 380,332 | 53.1 | |
| | Socialist | Tatsuhiko Tatsuta | 295,478 | 41.2 | |
| | Communist | Yasuo Furuki | 40,943 | 5.7 | |
| Turnout | Turnout | Turnout | 716,303 | 72.6 | −0.4 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1974 :
| Party | Candidate | Votes | % | ±% |
| Liberal Democratic | Takiichiro Hatsumara (Incumbent) | 365,198 | 51.9 | −2.7 |
| Socialist | Kenji Yamaguchi | 198,713 | 28.2 | −13.5 |
| Kōmeitō | Koreo Taniguchi | 84,463 | 12.0 | NEW |
| Communist | Shinsuke Nakata | 55,254 | 7.9 | +5.8 |
| Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1971 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Teiji Nakamura | 298,099 | 52.4 | |
| | Socialist | Tatsuhiko Tatsuta (Incumbent) | 242,715 | 42.6 | |
| | Communist | Kazuo Masumoto | 28,433 | 5.0 | |
| Turnout | Turnout | Turnout | 569,247 | 61.0 | −9.7 |
| | Liberal Democratic gain from Socialist | Liberal Democratic gain from Socialist | Liberal Democratic gain from Socialist | Liberal Democratic gain from Socialist | Liberal Democratic gain from Socialist |
1970 By-Election :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Takiichiro Hatsumura | 215,717 | 54.6 | |
| | Socialist | Masato Yoshinaga | 164,816 | 41.7 | |
| | Communist | Kazu Masumoto | 14,450 | 3.7 | |
| | Independent | Umeshige Yamagishi | 14,686 | 2.1 | |
| Turnout | Turnout | Turnout | 409,669 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1968 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Kanichi Kubo | 362,875 | 58.7 | |
| | Socialist | Kunito Abe | 211,821 | 34.3 | |
| | Communist | Yasunobu Uchida | 43,238 | 7.0 | |
| Turnout | Turnout | Turnout | 617,934 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1965 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Naozo Taura | 247,026 | 44.8 | |
| | Socialist | Tatsuhiko Tatsuta | 218,423 | 39.6 | |
| | Democratic Socialist | Yutaka Sano | 50,290 | 9.1 | |
| | Communist | Hajime Miyamoto | 22,930 | 4.2 | |
| | Japan New National Party | Hajime Hidaka | 7,662 | 1.4 | |
| | Independent | Jiro Fujita | 5,091 | 0.9 | |
| Turnout | Turnout | Turnout | 551,422 | 65.6 | −0.1 |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
* 1 2 Naozo Taura was elected in July 1965, however Taura died within 3 months of the election, so the second placed Tatsuhiko Tatsuta took the seat without a by-election
1962 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Kanichi Kubo | 320,911 | 55.7 | |
| | Socialist | Tatsuhiko Tatsuta | 241,968 | 42.0 | |
| | Communist | Junjiro Fukuoka | 13,755 | 2.4 | |
| Turnout | Turnout | Turnout | 576,634 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1959 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Shigeo Fujino (Incumbent) | 259,224 | 48.4 | |
| | Socialist | Shigemitsu Nakamura | 248,259 | 46.4 | |
| | Communist | Yutaka Miyajima | 28,138 | 5.3 | |
| Turnout | Turnout | Turnout | 535,621 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1956 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Democratic | Shunichiro Akiyama (Incumbent) | 267,640 | 50.5 | |
| | Socialist | Shigemitsu Nakamura | 242,355 | 45.7 | |
| | Communist | Masao Mori | 20,069 | 3.8 | |
| Turnout | Turnout | Turnout | 530,064 | | |
| | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold | Liberal Democratic hold |
1953 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Shigeo Fujino (Incumbent) | 229,203 | 43.8 | |
| | Right Socialist | Tadao Shimokawa | 212,689 | 40.7 | |
| | Kaishintō | Isamu Aoki | 81,254 | 15.5 | |
| Turnout | Turnout | Turnout | 523,146 | | |
| | Liberal gain from Independent | Liberal gain from Independent | Liberal gain from Independent | Liberal gain from Independent | Liberal gain from Independent |
1950 :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Shunichiro Akiyama | 225,963 | 43.0 | |
| | Independent | Tsuyoshi Kihara | 163,831 | 31.2 | |
| | Independent | Hideo Marugame | 135,588 | 25.8 | |
| Turnout | Turnout | Turnout | 525,382 | | |
| | Liberal gain from Democratic | Liberal gain from Democratic | Liberal gain from Democratic | Liberal gain from Democratic | Liberal gain from Democratic |
1948 By-Election :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Seiichi Kadoya | 133,314 | 43.9 | |
| | Liberal | Mansaku Fukuda | 104,593 | 34.4 | |
| | Socialist | Fumio Tsuji | 51,891 | 17.1 | |
| | Liberal | Shuzo Tsukamoto | 13,944 | 4.6 | |
| Turnout | Turnout | Turnout | 303,742 | | |
| | Democratic gain from Socialist | Democratic gain from Socialist | Democratic gain from Socialist | Democratic gain from Socialist | Democratic gain from Socialist |
1947 :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent | Shigeo Fujino | 126,859 | 35.2 | |
| | Socialist | Takeo Shimizu | 118,921 | 33.0 | |
| | Democratic | Soshichiro Tsukikawa | 58,180 | 16.2 | |
| | Liberal | Kiyoshi Yokose | 55,986 | 15.6 | |
| Turnout | Turnout | Turnout | 359,946 | | |
| | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) | Independent win (new seat) |
| | Socialist win (new seat) | Socialist win (new seat) | Socialist win (new seat) | Socialist win (new seat) | Socialist win (new seat) |