Katsuya Maiguma is a Japanese actor. After graduating from high school, he moved to Tokyo with the aim of becoming a film director and enrolled in the directing course at the Tokyo Film Arts Center (now Tokyo Professional School of Broadcasting, Arts and Acting).

Under the guidance of director Yuriko Juna, he studied drama and made his stage debut in 2010 in the play "TIC-TAC". He created numerous short films, such as VOEL. The 2016 film "Ken and Kazu" earned him the Best Newcomer award at the 71st Mainichi Film Awards (Sponichi Grand Prix), the Best Actor award at the 2017 Osaka Film Festival, and the Best Newcomer award at the 31st Takasaki Film Festival. He is represented by Alpha Agency.