# List of Oricon number-one singles of 1980

The highest-selling singles in Japan are ranked in the Oricon Singles Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each singles' physical sales. This list includes the singles that reached the number one place on that chart in 1980.

## Oricon Weekly Singles Chart

| Issue date | Song | Artist(s) |
| January 7 | "Ihōjin" | Sayuri Kume |
| January 14 | "Ihōjin" | Sayuri Kume |
| January 21 | "Ihōjin" | Sayuri Kume |
| January 28 | "Daitokai [ja]" | Crystal King |
| February 4 | "Daitokai [ja]" | Crystal King |
| February 11 | "Daitokai [ja]" | Crystal King |
| February 18 | "Daitokai [ja]" | Crystal King |
| February 25 | "Daitokai [ja]" | Crystal King |
| March 3 | "Daitokai [ja]" | Crystal King |
| March 10 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| March 17 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| March 24 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| March 31 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| April 7 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| April 14 | "Okuru Kotoba [ja]" | Kaientai [ja] |
| April 21 | "Runaway [ja]" | Chanels |
| April 28 | "Runaway [ja]" | Chanels |
| May 5 | "Runaway [ja]" | Chanels |
| May 12 | "Runaway [ja]" | Chanels |
| May 19 | "Runaway [ja]" | Chanels |
| May 26 | "Runaway [ja]" | Chanels |
| June 2 | "Runaway [ja]" | Chanels |
| June 9 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| June 16 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| June 23 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| June 30 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| July 7 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| July 14 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| July 21 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| July 28 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| August 4 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| August 11 | "Dancing All Night [ja]" | Monta & Brothers [ja] |
| August 18 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| August 25 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| September 1 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| September 8 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| September 15 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| September 22 | "Junko / Namida no Serenade [ja]" | Tsuyoshi Nagabuchi |
| September 29 | "Hatto Shite! Good [ja]" | Toshihiko Tahara |
| October 6 | "Hatto Shite! Good [ja]" | Toshihiko Tahara |
| October 13 | "Kaze wa Aki Iro / Eighteen [ja]" | Seiko Matsuda |
| October 20 | "Kaze wa Aki Iro / Eighteen [ja]" | Seiko Matsuda |
| October 27 | "Kaze wa Aki Iro / Eighteen [ja]" | Seiko Matsuda |
| November 3 | "Kaze wa Aki Iro / Eighteen [ja]" | Seiko Matsuda |
| November 10 | "Kaze wa Aki Iro / Eighteen [ja]" | Seiko Matsuda |
| November 17 | "I'm In the Mood for Dancing" Japanese title: "Dancing Sister" (ダンシング・シスター) | The Nolans |
| November 24 | "I'm In the Mood for Dancing" Japanese title: "Dancing Sister" (ダンシング・シスター) | The Nolans |
| December 1 | "Koibito yo [ja]" | Mayumi Itsuwa |
| December 8 | "Koibito yo [ja]" | Mayumi Itsuwa |
| December 15 | "Koibito yo [ja]" | Mayumi Itsuwa |
| December 22 | "Sneaker Blues [ja]" | Masahiko Kondō |
| December 29 | "Sneaker Blues [ja]" | Masahiko Kondō |