[1] The start of the Omega Tribe project, the band first came together as Cutie Panchos (きゅうてぃぱんちょす, Kiyuuti Panchosu) in 1978 consisting of high schoolers who frequented a live house.
After their performance at the 19th and 20th Yamaha Popular Song Contests, they were scouted by Koichi Fujita, who produced their discography alongside composer Tetsuji Hayashi.
[11] Fujita asked BMG Victor director Uji Okamura to help scout composer Tetsuji Hayashi to help with the band's songs.
[12] Hayashi and his lyricist, Chinfa Kan, initially presented the songs "Umikaze Tsushin" and "A.D. 1959" based on the band's soft rock background, but Fujita rejected the songs and asked for a piece that was "more Japanese" and melancholic, which resulted in "Summer Suspicion".
[14] The name Omega Tribe was suggested by Hawaiian DJ Kamasami Kong, but was among the bottom of the list out of multiple candidates.
A month before the release of the single, the song was performed by the band at the 12th Tokyo Music Festival on March 23, 1983 at Nakano Sunplaza.
[14] The band started production of their fourth studio album by February 1985, cutting down on the orchestral and brass sounds and replacing it with the Moog Polymoog and the Yamaha DX7.
[20] Although at the peak of their popularity by the single's release, Sugiyama started a discussion about potentially disbanding due to a dissonance between the band members and the production team.
Although on good terms, the difference in direction between the members and the team made them eventually support the disbandment unanimously.
In 2019, they released Omega Tribe Groove, a compilation and remix album that included newly recorded vocals by the members.
[25][26] In 2021, the band held a performance Tachikawa Stage Garden without a live audience due to the COVID-19 pandemic in Japan, with Takashima absent.