Hysteric Blue was a Japanese rock band formed in Osaka, Japan in 1997 and disbanded in 2004. During the course of their musical career they released a total of 14 singles, five studio albums, one compilation album, three video compilations, one DVD and 16 music videos.

They are known for anime fans as the band who provided the opening theme for the anime series Ghost Stories, the opening theme for Vampiyan Kids and the ending theme of Spiral ~Suiri no Kizuna~.

The band broke up after Guitarist Naoki Akamatsu was convicted of nine counts of rape and sentenced to 14 years of prison. Vocalist Tama and drummer Takuya then started a new band, The Screaming Frogs.

Akamatsu was released from prison in 2016. In 2020, he was arrested on suspicion of attempted obscenity. He was convicted in 2021, and sentenced to 1 year and 2 months in prison.