Yūsuke Tonozaki is a Japanese voice actor born on July 31, 1988, in Hokkaidō, Japan. Additional sources list an alternate birth date of April 10. He is affiliated with the agency Across Entertainment.

Tonozaki has built a career through supporting and guest roles across a wide range of anime series. One of his most prominent roles is the Chief Editor in the 2021 series MARS RED. He also voices the character Garun in the children's series Go! Go! Vehicle Zoo. In the Punirunes franchise, he provides the voice for Pikarune across multiple seasons from 2022 to 2025.

His other major anime voice credits include Tsuzumi House Survivor in Demon Slayer: Kimetsu no Yaiba, Gregor Klein in The Royal Tutor, Tatsuya Jinba in King's Game, and Eisuke Aizawa in the long-running series Detective Conan. More recent work includes a role as Yoshida in BAKI-DOU: The Invincible Samurai in 2026 and as a Black-Haired Emperors Member in Tasuketsu: Fate of the Majority in 2024. He also appears in Baki Hanma as various characters including Sakimura, and in Helck, Zom 100: Bucket List of the Dead, Aoashi, and The Genius Prince's Guide to Raising a Nation Out of Debt.

Tonozaki's filmography consists primarily of episodic and supporting roles rather than lead parts. He is also known by the alternative name Yuusuke Tonozaki, and his name in Japanese characters is 外崎 友亮.