Keisuke Satō is a Japanese former actor and voice actor. He was born on October 8, 1996, in Hanamaki City, Iwate Prefecture, Japan. Before entering the entertainment industry, he was a member of his junior high school's basketball club. He pursued his interest in performing arts by enrolling in the Super Eccentric Theater, where he graduated in 2017 as part of the third intake of its voice actor course.

His early career involved both stage acting and television appearances. He performed in several stage productions, including roles in adaptations such as Kagerou Days and the musical Memory Boys. He also made appearances on NHK television programs, including the drama The Guardian of the Spirit and the educational show Sekai no Tetsugakusha ni Jinsei Sōdan. In 2018, Sato became a founding member of the seven-man entertainment unit Grab"A", where he remained until his departure in May 2020.

Sato's most significant voice acting role came in 2019 when he was cast as Shingo Takenouchi in the original television anime series Stars Align, known in Japanese as Hoshiai no Sora. This role marked his official debut as a voice actor. In Stars Align, a drama series centered on a junior high school's soft tennis club, he portrayed a character described as the team's cheerful moodmaker and emotional core. Following his work on Stars Align, Sato continued to take on voice roles in various anime and video game productions. His credits from this period include a recurring role as Mr. Kitano in the third season of Chihayafuru, Eddie Hawthorne in Moriarty the Patriot, and a White Blood Cell in Cells at Work!. He also contributed voices to the Pokémon franchise across the long-running television series and video games. Keisuke Sato retired from the entertainment industry in 2021.