Born 1985 in Tokyo. Ko moved to the United States during high school and started interning in film productions while attending New Mexico's College of Santa Fe. In 2009, Ko started working full time in the film industry with the comedy movie Due Date (2010)starring Robert Downey Jr. Ko has since worked on a number of Hollywood feature films including The Avengers (2012), The Last Stand (2013)and The Wolverine (2013). Now Ko is a freelanced casting director based in Tokyo/LA, working on many commercials, music videos and films. He has also started producing a number of projects geared towards the international market.