| # | Party | Seat share | Seats | Vote share | ± |
|---|---|---|---|---|---|
| LDP | Liberal Democratic Party (Jiyū Minshutō) | 59.3 | 288 | 47.6 | -1.6 |
| JSP | Japan Socialist Party (Nihon Shakai-tō) | 18.5 | 90 | 21.4 | -6.6 |
| K | Komeito Party (Kōmeitō) | 9.7 | 47 | 10.9 | +5.5 |
| DSP | Democratic Socialist Party (Minshu Shakai-tō) | 6.4 | 31 | 7.7 | +0.3 |
| none | no party affiliation (no party affiliation) | 3.3 | 16 | 5.3 | |
| JCP | Japan Communist Party (Nihon Kyōsan-tō) | 2.9 | 14 | 6.8 | +2.0 |