Ryota Kohama

Career overview

Ryota Kohama, also known mononymously as Ryota and by his native name 小浜良太, is a Japanese musician and actor born on September 4, 1989, in Osaka, Japan. He is best known as the bassist of the rock band One Ok Rock. Earlier in his career, he formed a hip-hop dance group called Heads with Toru, along with Kohei and Takuya, when they were in the fifth and sixth grades. The group participated in dance competitions between 1995 and 1999 and debuted with the single screeeem! in July 2000, followed by Gooood or Bad! in November of that year, both produced for Amuse, Inc. After Heads disbanded in 2002, the members took a break in 2003 to improve their abilities before merging into a new group called Ground 0 with seven other members. In 2005, Toru explored acting and took a main role.

As an actor and musician, Kohama has known credits and has appeared in various projects associated with One Ok Rock. His known screen work includes Sonic Frontiers x One Ok Rock: Vandalize in 2022 and One Ok Rock x Monster Hunter Now: Make It Out Alive in 2023. Additionally, he is known for the film One Ok Rock Detox Japan Tour 2025 at Nissan Stadium in Cinemas, which was released in 2026. Throughout his career, he has maintained his role as the bassist for One Ok Rock while contributing to the band's various musical and visual media projects.