Keisuke Kaminaga is a Japanese actor and voice actor born on August 12, 1994, in Ibaraki Prefecture, Japan. He began his entertainment career after being a finalist in the 23rd Junon Superboy Contest, which led to him signing with the agency Production Ogi and making his stage debut in 2011. He is associated with砂岡事務所 (Sunaoka Office) as of recent career updates.

Kaminaga is known for his work as both a stage actor and a voice actor. His stage career includes prominent roles such as Yukimura Seiichi in the second season of the musical The Prince of Tennis and Souji Okita in the stage play幕末奇譚 SHINSEN5 ～外伝～.

He made his voice acting debut in 2015 with the role of Souma Kanzaki in the video game Ensemble Stars!. This remains his most significant voice role, and he has continued to voice the character in related franchise projects, including the 2019 television anime adaptation Ensemble Stars! and subsequent game releases and music albums. His work as Souma Kanzaki involves performance in character songs and collaborations with fellow cast members, notably梅原裕一郎 (Yuichiro Umehara) and神尾晋一郎 (Shinichiro Kamio), with whom he shares a good relationship through their work together in the unit AKATSUKI.

Beyond his voice acting debut, Kaminaga's on-screen acting credits include roles in the television dramas False Report Idol (2012), Fake Teacher (2013), and Alice (2020), as well as the film The End is the Beginning (2021). He remained with Production Ogi until the end of 2021 and has been working as a freelancer since 2022.