Tomohisa Ishikawa - is a video game artist. Tomohisa Ishikawa began his career in 2008 and has worked for companies such as SEGA. Tomohisa Ishikawa's first game was Sonic Riders: Zero Gravity which was released 16 years ago. Best Game Tomohisa Ishikawa contributed to was Sonic Riders: Zero Gravity. Tomohisa Ishikawa's latest work is Sonic Riders: Zero Gravity which was released 16 years ago.