Takahiro Mizushima is a Japanese voice actor and singer born on June 14, 1976, in Kanagawa Prefecture. He began his career in the late 1990s and was active with the agency Production Baobab from around the year 2000. In June 2011, following his departure from Production Baobab at the end of May, he joined the agency AXL-ONE. The following year, in 2012, he began sharing his experience as an instructor at AXL-ONE's affiliated training school, Axl Zero.

In addition to his voice acting work, Mizushima launched a music career in 2014 under the name TAKA, making his debut as a singer with the release of his first mini-album, Reflection, in March of that year. For work in adult games, he uses a different stage name, Uta Kijima.

Mizushima has built a extensive and varied career, contributing his voice to a wide range of anime television series, films, and video games. Among his many notable roles, he is known for playing Nagasumi Michishio in My Bride is a Mermaid, Romeo in Romeo x Juliet, Rolo Lamperouge in Code Geass: Lelouch of the Rebellion R2, and Takamatsu in Angel Beats!. He has also taken on leading roles in series such as Taichi Yaegashi in Kokoro Connect and Haruki Kitahara in White Album 2. In the long-running Inazuma Eleven franchise, he voices the character Hiroto Kiyama, also known as Gran. He is also recognized for his performances as Finland in the Hetalia series, Kotaro Takebayashi in the Assassination Classroom franchise, and Jōjirō Takajō in Charlotte.

Mizushima has a particularly strong association with the Fate franchise, where he has consistently voiced the character of Gawain across multiple productions. These include the video games Fate/Extra and Fate/Grand Order, as well as the animated series Fate/Extra Last Encore and Fate/Grand Carnival, and the film Fate/Grand Order The Movie Divine Realm of the Round Table: Camelot. He also voices the character Sherlock Holmes within the same franchise. His other roles from the 2020s include Natsuhiko Hyūga in Toilet-Bound Hanako-kun and its sequel After-School Hanako-kun, Megane in Rumble Garanndoll, Mushibu in Heaven's Design Team, Loki in Grimms Notes The Animation, and Bob in Ninjala.