2016 Tokyo prefectural by-election

A by-election was held on 31 July 2016 to fill vacancies in four districts of the Tokyo Metropolitan Assembly. The elections were held simultaneously with the gubernatorial election. Nominations for the election were announced on 22 July 2016.[1] Liberal Democratic Party candidates won all four elections.[2]

Ota district

The Ota district, which corresponds with Ota city, elects eight members to the 127-member assembly. Ken Tanaka, a second-term Democratic Party member who placed 1st in the 2009 election[3] and 7th in the 2013 election,[4] resigned from his seat in the assembly to contest the next national general election. In the closest contest of the four districts, LDP candidate Hiroyuki Yamamori defeated Democratic Party candidate Ai Mori by 4,141 votes (1.32%).[2]

Tokyo prefectural by-election, 2016 (Ota District)[2][5][6]

Party		Candidate	Votes	%	±%
	Liberal Democratic	Hiroyuki Yamamori	135,233	43.11
	Democratic	Ai Mori	131,092	41.79
	Independent	Koichi Mizoguchi	47,400	15.11
Total valid votes			313,725	91.85
Informal votes			27,844	8.15
Turnout			341,569	57.29	+12.79

Shibuya district

The Shibuya district, which corresponds with Shibuya city, elects two members to the assembly. Liberal Democrat Hideko Murakami, who was serving her fourth term in the assembly since being first elected in the November 2003 by-election, resigned from the assembly to contest the Shibuya mayoral election that was held on 26 April 2015, in which she placed third.[7]

Tokyo prefectural by-election, 2016 (Shibuya District)[2][6]

Party		Candidate	Votes	%	±%
	Liberal Democratic	Kazushige Maeda	45,807	46.30
	Democratic	Hiroki Hamada	35,559	35.94
	Communist	Yuji Orikasa	17,576	17.76
Total valid votes			98,942	92.92
Informal votes			7,540	7.08
Turnout			106,482	57.17	+21.51

Shinjuku district

The Shinjuku district, which corresponds with Shinjuku city, elects four members to the 127-member assembly. Kenichi Yoshizumi resigned from the assembly to contest the November 2014 Shinjuku mayoral election, which he won.

Tokyo prefectural by-election, 2016 (Shinjuku District)[2][6]

Party		Candidate	Votes	%	±%
	Liberal Democratic	Sachie Daimon	55,599	40.06
	Democratic	Masami Inotsume	33,983	24.49
	Independent	Tsukasa Moriguchi	24,664	17.77
	Communist	Takeki Fujiwara	24,529	17.68
Total valid votes			138,775	92.47
Informal votes			11,308	7.53
Turnout			150,083	56.97	+14.74

Taito district

The Taito district, which corresponds with Taito city, elects two members to the 127-member assembly. Liberal Democrat Yukuo Hattori, who was serving his third term in the assembly,[8] resigned to contest the Taito mayoral election on 1 March 2015, which he won with 47.9% of the vote in a six-candidate contest.[9]

Tokyo prefectural by-election, 2016 (Taito District)[2][5][6]

Party		Candidate	Votes	%	±%
	Liberal Democratic	Hiroshi Izumi	53,920	62.57
	Communist	Shigeru Koyanagi	32,252	37.43
Total valid votes			86,172	92.20
Informal votes			7,290	7.80
Turnout			93,462	59.43	+16.91

References

1. "東京都知事選挙及び東京都議会員補欠選挙（新宿区、台東区、大田区及び渋谷区の各選挙区）の選挙期日等の決定について" [About the determination of the election date for Tokyo gubernatorial election and Tokyo Metropolitan Assembly by-election (Shinjuku, Daito, Ota and Shibuya districts)] (PDF) (in Japanese). Tokyo Electoral Commission. 17 June 2016. Retrieved 15 July 2016.
2. "東京都議会議員補欠選挙　候補者別得票数（全候補）" [Tokyo Metropolitan Assembly By-Election: Votes received per candidate (all candidates)] (PDF) (in Japanese). Tokyo Electoral Commission. 31 July 2016. Retrieved 1 August 2016.
3. "都議会議員選挙（平成21年7月12日執行）開票結果" [Tokyo prefectural election (12 July 2009) Results] (in Japanese). Tokyo Electoral Commission. Retrieved 15 July 2016.
4. "東京都議会議員選挙（平成25年6月23日）開票結果" [Tokyo prefectural election (23 June 2013) Results] (in Japanese). Tokyo Electoral Commission. Retrieved 15 July 2016.
5. "東京都議会議員補欠選挙　開票結果内訳" [Tokyo Metropolitan Assembly By-Election Breakdown of Results] (PDF) (in Japanese). Tokyo Electoral Commission. Retrieved 1 August 2016.
6. "東京都議会議員補欠選挙　投票結果" [Tokyo Metropolitan Assembly By-Election Turnout] (PDF) (in Japanese). Tokyo Electoral Commission. Retrieved 1 August 2016.
7. "平成27年4月26日執行　渋谷区長選挙開票速報" [26 April 2015 Shibuya Mayoral Election Results] (in Japanese). Archived from the original on 28 July 2016. Retrieved 15 July 2016.
8. "服部 征夫（ハットリ ユクオ）自由民主党" [Yukuo Hattori LDP]. go2senkyo.com (in Japanese). Retrieved 15 July 2016.
9. "平成27年3月1日執行 台東区長選挙" [1 March 2015 Taito Mayoral Election] (PDF) (in Japanese). Taito Electoral Commission. p. 2. Archived from the original (PDF) on 16 August 2016. Retrieved 15 July 2016.