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 dateSongArtist(s)Ref.January 7"Ihōjin"Sayuri KumeJanuary 14January 21January 28""Crystal KingFebruary 4February 11February 18February 25March 3March 10""March 17March 24March 31April 7April 14April 21""ChanelsApril 28May 5May 12May 19May 26June 2June 9""June 16June 23June 30July 7July 14July 21July 28August 4August 11August 18""Tsuyoshi NagabuchiAugust 25September 1September 8September 15September 22September 29""Toshihiko TaharaOctober 6October 13""Seiko MatsudaOctober 20October 27November 3November 10November 17"I'm In the Mood for Dancing" Japanese title: The NolansNovember 24December 1""Mayumi ItsuwaDecember 8December 15December 22""Masahiko KondōDecember 29
See also 1980 in Japanese music
References Oricon No.1 Hits 500. Clubhouse. 1998. ISBN 9784906496129. vol 1 (1968~1985).