Kazuya Sakamoto is a Japanese singer who made his major debut in 2007 as one half of the identical-twin duo ON/OFF under SONY MUSIC. With ON/OFF, he became known for performing theme songs tied to anime and TV drama productions (including works connected to Durarara!!, Beelzebub, Vampire Knight, and Fūma no Kojirō) while also appearing in stage and media projects.

After ON/OFF disbanded in 2015, he shifted his focus to solo work and expanded his professional scope as a vocal director and instructor, including vocal direction for film/drama theme songs and coaching in educational settings. He continues to perform live and has also been active internationally, including appearances in Germany.

This time he performs with RAZARIS