Kazuki Katō is a Japanese actor, voice actor, and singer born on October 7, 1984, in Nagoya, Aichi Prefecture. He began his entertainment career after being a finalist in the Junon Superboy Contest, making his acting debut in 2003. Katō is affiliated with the agency Assist. His career foundation is primarily in stage and musical theater, where he gained widespread recognition for his role as Keigo Atobe in The Prince of Tennis musicals. He is also known to tokusatsu fans for his live-action role as Daisuke Kazama, also known as Kamen Rider Drake, in Kamen Rider Kabuto. This background as a musical actor contributes to his distinctive, low to mid-range singing and speaking voice, a quality that has become his trademark in voice acting.

As a voice actor, Katō has taken on several notable anime roles. He plays Kento Aizome, a member of the idol unit THRIVE, across the B-Project multimedia franchise, including the anime series B-Project: Kodou Ambitious, B-Project: Zecchou Emotion, and B-Project: Passion Love Call. He also voices the character Joker in the 2022 theatrical original video animation Mirage Queen Prefers Circus and its 2025 film sequel, Mirage Queen vacances élégantes. In 2025, he is set to voice Hans Axel von Fersen in the anime film adaptation of The Rose of Versailles. His other significant anime roles include Kikyo in Katekyo Hitman Reborn!, Ren Ichimoku in Jigoku Shōjo, Mitsunari Ishida in Gifuu Doudou!! Kanetsugu to Keiji, and Date Masamune in Ikémen Sengoku: Bromances Across Time.

In addition to anime, Katō has an extensive body of work in video games. His most prominent role is Malleus Draconia in the popular mobile game Disney Twisted-Wonderland, a role he will reprise in the 2025 anime series Disney Twisted-Wonderland The Animation: Episode of Heartslabyul. He has also voiced characters in several otome game franchises, such as Date Masamune in the Ikémen Sengoku series and Leon Dompteur in Ikémen Prince. His work in the B-Project franchise also extends to its related games.

Katō is known for several recurring professional relationships. He has consistently voiced characters in the CyberAgent's Ikémen series of games. Furthermore, his role as Kento Aizome represents a long-term commitment to the B-Project mixed-media project, which spans anime, games, and music.

For his achievements in theater, Katō received the 46th Kikuta Kazuo Theater Award for his performances in the musicals Roman Holiday and BARNUM. He has also performed solo concerts at Nippon Budokan, a major milestone for a musical artist.