Yū Wakabayashi is a male voice actor from Yamanashi Prefecture, Japan, born on July 8. He is affiliated with the talent management firm 81 Produce. His career in voice acting has been active since approximately 2014.

Wakabayashi has built a career with a broad range of supporting and character roles across many anime series. His notable anime credits include Sedol in the KonoSuba franchise, Carlos in That Time I Got Reincarnated as a Slime, Seitz Beatwin in The Great Cleric, Aoki in Hell's Paradise, Kazuma Tani in Haikyu!!, Kazuma Otaka in 2.43: Seiin High School Boys Volleyball Team, and Giichi in Boruto: Naruto Next Generations. He has also appeared in prominent long-running series such as Detective Conan and Doraemon.

He has a notable history of appearing in the Sylvanian Families anime series. In Sylvanian Families: Mini Story, he provided the voice for the character Lion and the father of the Maple Cat family. His voice acting work also extends to video games, where he has voiced roles in titles such as Beyblade Burst: Battle Zero, Jikkyou Powerful Pro Baseball 2018, and Akuma Shitsuji to Kuroi Neko. In addition to animation and games, his work includes dubbing for foreign films and television series, audio book narration, and voice comic performances.