1986 Japanese House of Councillors election 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
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.
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 ,[ 1] [ 2] National Diet