Tomoharu Minamiya is a professional name used by the Japanese actor, voice actor, and singer Tomoharu Takeo, who is professionally known as Ryūsei Nakao. Born in Tokyo on February 5, 1951, he began his career as a child actor and voice performer in the mid-1960s under the name Tomoharu Minamiya. He is currently affiliated with the talent agency 81 Produce. One of the earliest credited roles under this name is the character Jun in the 1965 anime series Uchū Patrol Hopper.

As a voice actor, his vocal style is frequently associated with characters possessing high-pitched voices and sadistic or villainous personalities. Over a career spanning more than five decades, he has portrayed numerous iconic antagonists in Japanese animation. Under the stage name Ryūsei Nakao, he is best known for his long-running role as Baikinman in the children’s series Soreike! Anpanman. He is also famous for voicing the characters Freeza, Cooler, and Frost across the Dragon Ball franchise, as well as Captain Mayuri Kurotsuchi in Bleach and Caesar Clown in One Piece. Other prominent roles include Lucemon in Digimon Frontier, Noise in Suite PreCure, Vaccine Man in One-Punch Man, and Tanji Washijō in Haikyū!!.

Throughout his extensive filmography, he has worked on several long-running productions for many years, including reprising his role as Baikinman since 1988 and his various Dragon Ball roles since the 1990s. He has also performed voice roles for Japanese dubs of international productions, such as Yakko Warner in Animaniacs and Bartok in the animated film Anastasia. Among his notable achievements is his consistent portrayal of characters in the theatrical films of the Soreike! Anpanman series. His status in the industry is also demonstrated by his frequent invitations as a guest to anime conventions internationally.