Osamu Ryūtani is a Japanese voice actor born on August 19, 1973, in Tokyo, Japan. He is affiliated with the talent agency Aoni Production. His blood type is Type A, and his height is recorded as 178 cm. Ryūtani has been active in the voice acting industry since 1998. His hobbies include skiing and participating in choir performances.

Ryūtani is known for a range of voice roles across anime and video games. In the long-running anime series One Piece, he has voiced multiple characters, including Holy, Pickles, and Denny. His other notable anime roles include Kinshirou Morooka in Persona 4 the Animation, Matsuda in Air Master, and Kijima in Submarine 707R.

In the video game medium, Ryūtani is recognized for his work in the Dynasty Warriors series, where he provided the voice for the characters Yuan Shao and Ma Dai. He also voiced Wald Wales in an unspecified title and Leganchor the Gelroid in Rockman ZX.