Kenji Hamada is a Japanese voice actor born on April 12, 1972, in Fukuoka Prefecture. He is affiliated with the talent agency Mausu Promotion. His interest in animation and film from childhood led him to pursue a career in voice acting. After working various part-time jobs, he moved to Tokyo at the age of twenty-one and enrolled in a vocational school to receive his training. He entered the Ezaki Production affiliated training school in 1996 and has been a member of Mausu Promotion since 1998.

Hamada's early career focused extensively on dubbing foreign television dramas and films, with his anime roles often being minor or background characters. A significant turning point was his role as Patrick Colasour in the 2007 series Mobile Suit Gundam 00, which brought him wider recognition and led to more substantial anime casting. His profile was further elevated by his portrayal of Teppei Kiyoshi, a founding member of the Seirin High basketball team, in the popular series Kuroko's Basketball.

Over his career, Hamada has built an extensive and diverse filmography, lending his voice to a wide array of characters. His notable anime roles include George Koizumi in Paradise Kiss, Takumi Nomiya in Honey and Clover, Killer in One Piece, and Fugaku Uchiha and Shibi Aburame in the Naruto franchise. He has also appeared in series such as Kingdom as Fun Ki, Bakuman. as Taro Kawaguchi, and Chihayafuru as Kenji Ayase. His versatility extends to roles in productions like ODDTAXI as Dobu, Seirei Gensouki - Spirit Chronicles as Alfred Emerle, and That Time I Got Reincarnated as a Slime as Erald Grimwald, among many others.

In addition to anime, Hamada is a prolific voice actor in video games. His game credits include Susano'o in the Warriors Orochi series, Xun You in Dynasty Warriors 9, Hanneman von Essar in Fire Emblem: Three Houses, and Shingen Takeda in Samurai Warriors 5. He has also reprised his anime role of Killer for the game One Piece: Pirate Warriors 4. In the popular online game Final Fantasy XIV, he voices the character Estinien Wyrmblood.

Hamada is known for his calm and somewhat reserved personality, described by colleagues as modest and cheerful. He approaches his craft with a logical and analytical mindset, often building his performances from a place of intellectual understanding before fully embodying a character. Colleagues and fans alike affectionately use the nickname "HamaKen" for him. He was a long-time smoker but successfully quit for health reasons. In 2006, he married fellow voice actress Junko Takeuchi, and they have two children together.