Katsuhisa Namase is a Japanese actor and voice actor born on October 13, 1960, in Hyogo Prefecture, Japan. He is a graduate of Doshisha University. Namase began his entertainment career in theater, using the stage name Sansuke Yarimakuri, before transitioning to on-screen roles under his birth name in the late 1980s. While he is widely known for his extensive work in live-action television and film, he has also contributed his voice to animated projects and video games.

Namase's career is primarily defined by his live-action roles in popular Japanese dramas and films. He has been a prominent supporting actor for decades, with notable performances in series such as Trick, Gokusen, and the 2018 tokusatsu series Kamen Rider Zi-O. His voice acting work, while a smaller part of his overall portfolio, includes significant roles. He voiced the character Tiger, a childhood friend turned terrorist and the primary antagonist in the 2003 anime film Kochira Katsushika-ku Kamearikouen-mae Hashutsujo The Movie 2. A more recent and internationally recognized voice role is that of David Shield in the 2018 anime film My Hero Academia: Two Heroes. He voiced the adult version of David, a scientist and the best friend of the hero All Might.

Namase's work includes recurring collaborations with specific production teams and co-stars, particularly in live-action. He has frequently appeared with actress Yukie Nakama in projects like Trick and Gokusen. In the realm of voice acting, he has a notable but early history with video game developer SNK, having provided Japanese voices for characters such as Joe Higashi and Billy Kane in several titles from the early 1990s, including Fatal Fury 2 and The King of Fighters '94.

Over his long career, Namase has received recognition for his acting abilities, winning the Best Supporting Actor award at the 2005 Takasaki Film Festival for his role in the live-action film Papa no Kobushi de Utte. His achievements are primarily centered on his extensive and acclaimed work in Japanese cinema and television, with his voice acting contributions being a notable extension of his versatile performing career.