Tomohisa Asō, also known by his stage name Tomohisa Asō, is a Japanese voice actor and narrator. He was born on May 13, 1949, in Kanagawa Prefecture, Japan. His real name and former stage name is Takuya Matsumaru. He is affiliated with the talent agency Aoni Production. Asō stands 174 cm tall and has O blood type.

Asō began his voice acting career in the early 1990s after graduating from the Theater Company Subaru's affiliated Comprehensive Art Academy and completing the 11th class at the Aoni Juku Tokyo school. His voice is classified as high baritone to tenor, and he is particularly recognized for his skill in portraying middle-aged and elderly characters, often using a low, gravelly tone. One of his noted skills is tate, the art of stage combat.

Asō has built an extensive filmography over several decades, consisting largely of supporting roles in a wide array of anime series. He has voiced characters in major long-running franchises as well as shorter seasonal series. Among his many roles are the Old Prisoner in Baki Hanma, Mayzel in Spriggan, George in Fastening Days, Captain and Dr. Nako in One Piece, Galileo Galilei in Nintama Rantarō no Uchū Daibōken with Cosmic Front☆Next, Sai Taku in Kingdom, Matsugorō Sawamura in Those Snow White Notes, Bogey Mizuhara in Shinken Densetsu Tight Road, SIU Director in PERSONA 5 the Animation, the narrator in Fist of the Blue Sky Regenesis, Yohei Onuma in Guyver: The Bioboosted Armor, the Jade Emperor in Monkey Magic, Daigo Oguruma in God Eater, Furukabu and Gengorō Onigawara in Inazuma Eleven, Densuke in Den-noh Coil, Maceo Henderson in Bubblegum Crisis: Tokyo 2040, Krall Orslow in As a Reincarnated Aristocrat, I'll Use My Appraisal Skill, Heiserard in High School Prodigies Have It Easy Even In Another World, Dr. Light in MegaMan Maverick Hunter X: The Day of Sigma, Edgar in Croisée in a Foreign Labyrinth - The Animation, and Dr. Hajime in Daigunder.

His extensive career includes other notable roles such as Pastor Nick in Attack on Titan, Dr. Nako in One Piece, Seishiro Momoi in Samurai Champloo, Pui Pui in Dragon Ball Z, and the narrator for the television series Fist of the Blue Sky. Beyond anime, Asō has provided voices for video games, including Peppy Hare in the Star Fox series and Dr. Light in the Mega Man X franchise, and has worked on dubbing for foreign films and television series. He has also been active as a narrator for Japanese television documentaries and programs.