Garret Sato was born in Oahu, Hawaii and attended Aiea High School and then Leeward Community College where he started his acting carreer. Sato has been part of numerous movies including: Pearl Harbor, The Mask, Street Kings, The Shadow, Wasteland, Violent Blue and the short film 'Blood Country' which premiered in 2008 at the Hawaii International Film Festival..

He has had a reoccurring role on the television show Hawaii Five-0 as Detective Ahuna. Sato has also has roles in the television shows: 24, ER, NCIS: Los Angeles and Alias.