1986 Japanese House of Councillors election

House of Councillors elections were held in Japan on 6 July 1986 to elect half the seats in the upper house of the Diet. The elections were held alongside elections for the House of Representatives, the second and most recent such instance since 1980.

1986 Japanese House of Councillors election

6 July 1986
127 of the 252 seats in the House of Councillors 127 seats needed for a majority
First party Second party Third party   Leader Yasuhiro Nakasone Masashi Ishibashi Yoshikatsu Takeiri Party LDP Socialist Kōmeitō Last election 137 seats, 35.3% 44 seats, 16.3% 26 seats, 15.7% Seats after 140 41 24 Seat change 3 3 2 Popular vote 22,132,573 9,869,088 7,438,501 Percentage 38.6% 17.2% 13.0% Swing 3.3pp 0.9pp 2.7pp   Fourth party Fifth party Sixth party   Leader Kenji Miyamoto Tsukamoto Saburō Seiichi Tagawa Party JCP Democratic Socialist New Liberal Club Last election 14 seats, 8.9% 11 seats, 8.4% 2 seats, 2.7% Seats after 16 12 2 Seat change 2 1 Popular vote 5,430,838 3,940,325 1,367,291 Percentage 9.5% 6.9% 2.4% Swing 0.6pp 1.5pp 0.3pp
President of the House of Councillors before election Matsuo Kimura LDP Elected President of the House of Councillors Masaaki Fujita LDP

Results

Party		National			Constituency			Seats
		Votes	%	Seats	Votes	%	Seats	Not up	Won	Total after	/–
	Liberal Democratic Party	22,132,573	38.58	22	26,111,258	45.07	50	68	72	140	3
	Japan Socialist Party	9,869,088	17.20	9	12,464,579	21.51	11	21	20	41	–3
	Kōmeitō	7,438,501	12.97	7	2,549,037	4.40	3	14	10	24	–2
	Japanese Communist Party	5,430,838	9.47	5	6,617,487	11.42	4	7	9	16	2
	Democratic Socialist Party	3,940,325	6.87	3	2,643,370	4.56	2	7	5	12	1
	Tax Affairs Party	1,803,051	3.14	1	327,444	0.57	0	1	1	2	New
	New Party for Salaried Men	1,759,484	3.07	1				2	1	3	1
	Dainiin Club	1,455,532	2.54	1				2	1	3	1
	New Liberal Club	1,367,291	2.38	1				1	1	2	0
	Other parties	2,166,059	3.78	0	1,192,801	2.06	0	1	0	1	–
	Independents				6,032,259	10.41	6	1	6	7	1
Vacant							1	0	1	1	–
Total		57,362,742	100.00	50	57,938,235	100.00	77	125	127	252	0
Valid votes		57,362,742	93.06		57,938,235	93.94
Invalid/blank votes		4,280,530	6.94		3,735,135	6.06
Total votes		61,643,272	100.00		61,673,370	100.00
Registered voters/turnout		86,426,845	71.32		86,426,845	71.36
Source: Ministry of Internal Affairs and Communications, National Diet

By constituency

Constituency	Total seats	Seats won
		LDP	JSP	Kōmeitō	JCP	DSP	TAP	NPSM	DC	NLC	Ind.
Aichi	3	1				1					1
Akita	1	1
Aomori	1										1
Chiba	2	1	1
Ehime	1	1
Fukui	1	1
Fukuoka	3	2	1
Fukushima	2	1	1
Gifu	1	1
Gunma	2	2
Hiroshima	2	1				1
Hokkaido	4	2	1		1
Hyōgo	3	1	1	1
Ibaraki	2	1	1
Ishikawa	1	1
Iwate	1	1
Kagawa	1	1
Kagoshima	2	2
Kanagawa	2	1	1
Kōchi	1	1
Kumamoto	2	2
Kyoto	2	1			1
Mie	1	1
Miyagi	1	1
Miyazaki	1										1
Nagano	2	1	1
Nagasaki	1	1
Nara	1	1
Niigata	2	1	1
Ōita	1	1
Okinawa	1	1
Okayama	2	1									1
Osaka	3			1	1						1
Saga	1	1
Saitama	2	1	1
Shiga	1										1
Shimane	1	1
Shizuoka	2	1	1
Tochigi	2	2
Tokushima	1	1
Tokyo	4	2		1	1
Tottori	1	1
Toyama	1	1
Wakayama	1	1
Yamagata	1	1
Yamaguchi	1	1
Yamanashi	1	1
National	50	22	9	7	5	3	1	1	1	1
Total	126	72	20	10	9	5	1	1	1	1	6