"Sayonara" is the title of a 1981 song by Mary MacGregor. It was one of two songs she contributed to the Japanese Anime film, Aideu Galaxy Express 999.
"Sayonara" – 5:34 (written by Mary MacGregor & Brian Whitcomb)
"Love Light" – 4:00 (written by Mary MacGregor, David J. Holman & Brian Whitcomb)