Tomoharu Takeo (竹尾 智晴 Takeo Tomoharu), known by his stage name Ryusei Nakao (中尾 隆聖 Nakao Ryūsei), is a Japanese actor, singer and voice actor. He is attached to 81 Produce and worked under the name of Tomoharu Minamiya (南谷 智晴 Minamiya Tomoharu). He is married and has a son and a daughter.
- Soreike! Anpanman - Voice of Baikinman
- Touch - Voice of Ishami Nishimura
- Bleach - Voice of Mayuri Kurotsuchi
- Digimon Frontier - Voice of Lucemon Chaos Mode
- Dragon Ball - Voice of Tambourine
- Dragon Ball Z - Voice of Frieza, Cooler, Chilled
- Dragon Ball Super - Voice of Frost
- One Piece - Voices of Caesar Clown and Eric
- One Punch Man - Voice of Vaccine Man
- Saint Seiya - Voice of Kraken Isaak
- Beast King Golion - Voices of Shirogane Takashi and Shirogane Ryō
- Igano Kabamaru - Voice of Kabamaru Igano
- Mega Man NT Warrior - Voice of Snake Man
- Montana Jones - Voice of Alfred Jones
- Demashitaa! Powerpuff Girls Z - Voice of "Him"
- Yu-Gi-Oh! - Voice of Playing Card Bomber
- Tokusou Sentai Dekaranger - Voice of Alien Rain Agent Abrella
- Shuriken Sentai Ninninger - Voice of Masakage Tsugomori
- Lady and the Tramp - Voice of Tramp
- Tiny Tunes Adventures - Voice of Buster Bunny
- Along with Toru Furuya, both veteran voice actors had starred in episode 13 of Ultra Q as child actors.