Ryota Kohama

Ryota Kohama, known mononymously as Ryota, is a Japanese musician and the bassist of the band ONE OK ROCK.

With two other men, Kohei and Takuya, Ryota and Toru formed a hip-hop dance group called Heads when they were fifth and sixth-graders. They participated in dance competitions in the late 1990s, between the years 1995 to 1999. Heads debuted with a single entitled "screeeem!" in July 2000 and followed with "Gooood or Bad!" in November, produced for Amuse, Inc. Heads disbanded in 2002, and in 2003 they took a break to improve their abilities. They merged into a new group with seven other members and were called GROUND 0.

In 2005, when Toru tried to explore acting and took a main role in the TV series Shibuya Fifteen, Ryota also played a minor character in the drama.