Masatomo Nakazawa is a Japanese voice actor and actor born on February 14, 1983, in Nerima, Tokyo. He is affiliated with the talent management cooperative Tokyo Actor's Consumer's Cooperative Society, commonly known as Haikyō. His real name is Masatomo Nakazawa, written with the characters 中澤 匡智, and he uses the stage name 中澤 まさとも, which is pronounced the same way. He is also known by the nickname Namo.

Nakazawa began his career in 2003 with a small role in the anime series Ai Yori Aoshi. He attended Nihon University's film department but left before completing his course. Early in his career, he was affiliated with Ken Production. In June 2016, he became a freelance artist before joining Haikyō in December of the same year.

A significant milestone in his career was his role as the android Clear in the 2014 anime adaptation of the visual novel Dramatical Murder, a performance for which he is particularly well-known. This role also led to him performing a character song, Kurage no Uta.

Nakazawa has built a diverse filmography across various anime series. In sports anime, he is recognized as Kenji Futakuchi in Haikyu!! and as Wataru Kuon in Blue Lock. He has a notable presence in boys' love and drama series, including his role as Haruki Nakayama in Given, as Itsuki Shikatani in Yarichin Bitch-bu, and as Giichi Ichikawa in Twilight Out of Focus. His other prominent anime roles include Shuichiro Sawaki in Wonder Egg Priority, Tao in Noblesse, Baro Barows in The Titan's Bride, Hutt River in Hetalia The World Twinkle, and Saneatsu Narita in Tasūketsu: Judgement Assizes. Beyond anime, his voice work extends to video games, where he has voiced characters such as Tatsumi Kazehaya in Ensemble Stars!. He also has a background in stage acting, having performed in numerous theater productions early in his career.

Nakazawa has a twin brother and is a relative of fellow voice actress and singer Rika Morinaga.