Born 1985 in Tokyo, Japan. In his youth, Ko watched the Indiana Jones series and was inspired to pursue a career in films. After finishing junior high in Japan, he moved alone to the United States in a study abroad program, and during his time at university at Santa Fe, New Mexico, he began interning on film productions. In 2009, he fully entered the film industry, working in production on the film Due Date, starring Robert Downey Jr. He followed this with his involvements on many major Hollywood blockbusters such as, Breaking Bad, Avengers, The Last Stand and The Wolverine. Since then, he has been working in Japan, focusing his attention on international productions of films, commercials and music videos. Ko is now an independent casting director, and owner of Kaiju Inc. His mission is to bring amazing Japanese talents to the international stage.
Ko is a member of the Casting Society of America.In 2023, "PACHINKO" (Apple TV+) was nominated for the 38th Artios Awards (Television Pilot and First Season - Drama Category).

Born and raised under Mt. Fuji, Rikiya grew up surrounded by nature in Japan. When he was in junior high he was inspired by Nishida Toshiyuki. He soon started following his dream to work in Hollywood as a filmmaker. After graduating in Tokyo, he attended California State University, Northridge to pursue a major in Film Production. Rikiya worked on various short films as a Producer and Art Director while attending CSU. Since 2018 he has been working with the production company tenFrames as a Producer. In addition to his work behind the camera, he has acted in various projects including the independent feature films, Netflix Original Series, and also he has been working at a casting company KAIJU INC in Tokyo and worked for International/Japanese MV, Commercial, TV shows and films such as "Naked Director 2", "Tokyo Vice", "Uber Eats Commercial Series" as a casting director. He is a diligent and creative filmmaker from Japan who has been challenging himself in Hollywood to make his dream come true.