Tomoya Kanki, also known as Tomoya, is the band's drummer. Tomoya was born on June 27, 1987 in Hyogo.

Initially, Tomoya was not a regular member of One Ok Rock, but came to rehearse from time to time, as he was in a different band. But a month before One Ok Rock's debut, he joined them as a regular member and successfully debuted with the band. Tomoya most actively updates the blog and communicates with fans on social networks.

Tomoya is the oldest member of the band and, in addition to drums, also plays the xylophone.