- Stage Name: Kubota Masahiko (クボタマサヒコ)
- Real Name: Kubota Masahiko (久保田匡彦)
- Birthdate: September 23, 1973
- Birthplace: Tokyo, Japan
- Homeplace: Hayama, Kanagawa Prefecture, Japan
Kubota Masahiko debuted in 2000 as the vocalist and guitarist of the punk band popcatcher, however they disbanded the following year, in 2001. On the next two years he worked as guitarist on the disbanded rock band BADWAGON and the un-debuted AVANTI.
In December 2003, he joined as the bassist of the disbanded group BEAT CRUSADERS. Currently, he is the vocalist and guitarist of the rock band kuh. He is also a member, along fellow BEAT CRUSADERS members Mashiita and Katou Tarou, of the un-debuted band TOQUIO LEQUIO TEQUNOS (originally called RYUKYU CRUSADERS), which mixes rock and techno music.
- He has kept BEAT CRUSADERS tradition of hiding their faces, and he always appears with his face in shadows or blurred in photos.