Kitamura's first two feature films, Porno and I'll Be There With You were both written and directed by him. He also starred in both of the films, playing the main characters. Kitamura won the 2006 Outstanding Indie Directorial Debut Award for I'll Be There With You.
In 2008, Kitamura appeared in a number of television roles, including VH1's New York Goes to Hollywood and MTV's From Gs to Gents. He also appeared in NBC's Heroes as Tadashi, a Japanese businessman who tries to commit suicide. The role's dialogue was done in Japanese to keep with the character.