Insomnia (インソムニア Insomunia) is the debut album by Japanese singer-songwriter Chihiro Onitsuka, released in March 2001. The album features acoustic-oriented production arranged by Takefumi Haketa, who produced all her studio albums released under the Virgin Tokyo label distributed by Toshiba EMI. It comprises 11 tracks written by Onitsuka, including hit singles "Cage", "Edge","Memai", and her most well-known and successful song "Gekkō." "Rasen" (a song whose working title was "My Fragile Life") was featured on the 2002 motion picture Wasabi directed by Luc Besson and starred by Ryōko Hirosue.