So Yamanaka was born on January 30, 1972 in Ibaraki, Japan. He is an actor, known for Kill Bill: Vol. 1 (2003), Kill Bill: Vol. 2 (2004) and Kamen Rider Movie War 2010: Kamen Rider vs. Kamen Rider W & Decade (2009). He is married to Momoko Yamanaka.