KEISEI is a Japanese singer. He is a member of the vocal group DEEP. He joined the group in 2007 after being semi-finalist of the "EXILE VOCAL BATTLE AUDITION 2006 ~ASIAN DREAM~".
- Stage Name: KEISEI
- Real Name: Amou Keisei (天羽景聖)
- Birthdate: January 24, 1986
- Birthplace: Sapporo, Hokkaido, Japan
- Blood Type: A