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