Valentine D.C. is formed in Osaka (大阪)大阪 as VALENTINE.
Note: a 1990 magazine refers to SWEET DEATH bassist Tamai Jun (多満井 淳) as having been ex-VALENTINE (ヴァランタイン). It's not confirmed whether this information is correct, and, if so, whether it refers to this VALENTINE or a different band of the same name. Either way, he's not the same Jun that is classically associated with this band.
Vo.Ken-ichi Gt.Nao Gt.Kohichi Ba.Jun Dr.Hiroshi
VALENTINE change their name to Valentine D.C. in late 1990.
Dr.Hiroshi leaves VALENTINE, and is then replaced by Dr.Mori.
Vo.Ken-ichi Gt.Nao Gt.Kohichi Ba.Jun Dr.Mori
Gt.Kohichi leaves, and is never replaced, and the band then go on as a four-piece.
Vo.Ken-ichi Gt.Nao Ba.Jun Dr.Mori
Dr.Mori leaves and is then replaced by Takeshi.
Vo.Ken-ichi Gt.Nao Ba.Jun Dr.Takeshi
Gt.Nao changes his name to Naoya.
Vo.Ken-ichi Gt.Naoya Gt.Kohichi Ba.Jun Dr.Mori
Valentine D.C. go major and sign to BMG Japan
Valentine D.C. switch labels to Nippon Columbia.
Valentine D.C. officially disbands.
Valentine D.C. reunites for one night only.
Valentine D.C. officially reunites without Gt.Naoya and Dr.Takeshi.
Drummer Tsuki joins.
Vo.Ken-ichi Ba.Jun Dr.Tsuki