| Election Name: | 1980 Japanese House of Councillors election |
| Country: | Japan |
| Flag Year: | 1870 |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1977 Japanese House of Councillors election |
| Previous Year: | 1977 |
| Next Election: | 1983 Japanese House of Councillors election |
| Next Year: | 1983 |
| Seats For Election: | 127 of the 252 seats in the House of Councillors |
| Majority Seats: | 127 |
| Election Date: | 22 June 1980 |
| Image1: | Masayoshi Ohira.jpg |
| Leader1: | Masayoshi Ōhira |
| Party1: | Liberal Democratic Party (Japan) |
| Last Election1: | 124 seats, 35.8% |
| Seats After1: | 135 |
| Seat Change1: | 11 |
| Popular Vote1: | 23,778,190 |
| Percentage1: | 42.5% |
| Swing1: | 6.7% |
| Leader2: | Ichio Asukata |
| Party2: | Japan Socialist Party |
| Last Election2: | 56 seats, 17.3% |
| Seats After2: | 47 |
| Seat Change2: | 9 |
| Popular Vote2: | 7,341,828 |
| Percentage2: | 13.1% |
| Swing2: | 4.2% |
| Image3: | Yoshikatsu-Takeiri-3.png |
| Leader3: | Yoshikatsu Takeiri |
| Party3: | Kōmeitō (1962–1998) |
| Last Election3: | 28 seats, 14.2% |
| Seats After3: | 26 |
| Seat Change3: | 2 |
| Popular Vote3: | 6,669,387 |
| Percentage3: | 11.9% |
| Swing3: | 2.3% |
| Image4: | Kenji Miyamoto (cropped).jpg |
| Leader4: | Kenji Miyamoto |
| Party4: | Japanese Communist Party |
| Last Election4: | 16 seats, 8.4% |
| Seats After4: | 12 |
| Seat Change4: | 4 |
| Popular Vote4: | 4,072,019 |
| Percentage4: | 7.3% |
| Swing4: | 1.1% |
| Image5: | Kasuga-Ikko-1.jpg |
| Leader5: | Kasuga Ikkō |
| Party5: | Democratic Socialist Party (Japan) |
| Last Election5: | 11 seats, 6.7% |
| Seats After5: | 11 |
| Popular Vote5: | 3,364,478 |
| Percentage5: | 6.0% |
| Swing5: | 0.7% |
| Image6: | Yohei Kono 1985.jpg |
| Leader6: | Yōhei Kōno |
| Party6: | New Liberal Club |
| Last Election6: | 4 seats, 3.9% |
| Seats After6: | 2 |
| Seat Change6: | 2 |
| Popular Vote6: | 351,291 |
| Percentage6: | 0.6% |
| Swing6: | 3.3% |
| President of the House of Councillors | |
| Before Election: | Ken Yasui |
| Before Party: | Liberal Democratic Party (Japan) |
| After Election: | Masatoshi Tokunaga |
| After Party: | Liberal Democratic Party (Japan) |
House of Councillors elections were held in Japan on 22 June 1980. On 16 May the Japan Socialist Party (JSP) brought no-confidence motion before the Diet relating to corruption issues, proposing more defense spending and rises in public utility charges as reasons for the House of Representatives to withdraw its backing from the government. Unexpectedly, 69 Liberal Democratic Party (LDP) members of the Diet from the Fukuda Takeo, Miki Takeo and Hidenao Nakagawa factions abstained from voting on the motion. The government was defeated by 56 votes in total of 243 and resigned. For the first time elections for both the House of Councillors and the House of Representatives were elected at the same time. In the elections of both the houses the LDP gained a majority.
| Constituency | Total seats | Seats won | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| LDP | JSP | Kōmeitō | JCP | DSP | SDF | Others | Ind. | |||
| Aichi | 3 | 1 | 1 | 1 | ||||||
| Akita | 1 | 1 | ||||||||
| Aomori | 1 | 1 | ||||||||
| Chiba | 2 | 1 | 1 | |||||||
| Ehime | 1 | 1 | ||||||||
| Fukui | 1 | 1 | ||||||||
| Fukuoka | 3 | 1 | 1 | 1 | ||||||
| Fukushima | 2 | 1 | 1 | |||||||
| Gifu | 1 | 1 | ||||||||
| Gunma | 2 | 1 | 1 | |||||||
| 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 | 1 | 1 | 2 | ||||||
| Tottori | 1 | 1 | ||||||||
| Toyama | 1 | 1 | ||||||||
| Wakayama | 1 | 1 | ||||||||
| Yamagata | 1 | 1 | ||||||||
| Yamaguchi | 1 | 1 | ||||||||
| Yamanashi | 1 | 1 | ||||||||
| National | 50 | 21 | 9 | 9 | 3 | 4 | 1 | 3 | ||
| Total | 126 | 69 | 22 | 12 | 7 | 6 | 1 | 1 | 8 | |