Ryuhei Kitamura
Yamaguchi was born in 1971 and attended the . After graduation he won a number of awards at independent film festivals. In 2000 he co-wrote (with director Ryuhei Kitamura) the action-horror film "Versus" (VERSUS　ヴァーサス) starring Tak Sakaguchi. Yamaguchi was also a second-unit director on the movie.