[2] In 2019, the band reunited with a new vocalist, Daishi Uehara, and two former members, Shibasaki and Kimura, under the D-Go recording label.
The band was founded in 1991 by main vocalist Show Wesugi, guitarist Hiroshi Shibasaki, and keyboardist Kousuke Oshima.
Wesugi was a fan of Axl Rose and Oshima was a guest member of Japanese rock band Loudness.
Collaborating with Miho Nakayama, they released "Sekaijū no Dare Yori Kitto (Certainly More Than Everybody in the World)" in October 1992, which became one of the standard J-pop songs.
[4] Wesugi wrote Deen's debut song "Konomama Kimidake wo Ubaisaritai (Now, I Want to Make Off with Only You)", which sold over a million copies after its release in March 1993.
[4] Their 1995 studio album, Piece of My Soul, reached the #1 position on the Oricon charts, with sales of over 542,000 copies the first week.
[12] After the release of the single "Worst Crime (About a Rock Star who was a Swindler)" in February 1996, Wesugi and Shibasaki withdrew from the band.
[18] Their debut song, "Sabitsuita Machine Gun de Ima o Uchinukō", written by Miho Komatsu, was used as the end credits theme for Dragon Ball GT.
[22][23] On 16 February 2020, it was announced that a new single, "Daki Yose, Takamaru, Kimi no Taion to Tomoni", written by Shibasaki and Haibara, would be released in May.