Manaka Sawa is a Japanese voice actor primarily known for his work in adult games and drama CDs. He is also active in mainstream anime and video games under his real name, Masatomo Nakazawa. He was born on February 14, 1983, in Nerima, Tokyo, Japan. His real name and former stage name is Masatomo Nakazawa. He became a freelancer in June 2016 and signed with the talent agency Tokyo Actor's Consumer's Cooperative Society (Haikyo) in December of the same year.

Sawa's career encompasses a wide range of roles in both BLCDs and otome CDs. He gained recognition for his role as Clear in the BL game Dramatical Murder. In mainstream anime, he is credited under his legal name, Masatomo Nakazawa, with roles such as Kenji Futakuchi in the series Haikyu!! and Haruki Nakayama in Given.

In anime productions, he has voiced the specific roles mentioned in the query. He played Ishida in the series Confessions of a Slutty Wife. In the series Crazy Over His Fingers, he took on the role of Sōsuke Nanase. For the series Eternity: Shinya no Nurekoi Channel, he provided voices for two characters: Kengo Sakurai and Sosuke Tanaka.

Beyond his voice work, Sawa has a number of personal interests and skills. These include illustration, sports, action and sword fighting as a suits actor, and skiing. He is also experienced with using a dummy head microphone. He has a twin brother and is known for his enthusiasm for tokusatsu.