Yuuya Yamauchi is a Japanese voice actor born on October 14th in Chiba Prefecture. An archived talent agency profile indicates that his special skill was performing in a female voice register. His early career included a range of work beyond anime voice acting, with credits in television programs, radio dramas, and dubbing for foreign content. His television appearances included segments on Nippon TV shows such as Itsutemo Haran Banjō and a segment on the program Naita Waratta Gotaimen: Ano Hito ni Aitai focusing on baseball player Yoshihiko Takahashi. His work in radio drama included a role as Daichi in the series Heart no Mahō for Radio Nippon, as well as participation in several other radio dramas for broadcasters like Ibaraki Hōsō, Tochigi Hōsō, and Fukui Hōsō. He was also involved in dubbing, providing the voice for the character Bill in the direct-to-TV series The Adventures of Pete & Pete for DirecTV, and he participated in the Japanese language adaptation work for the Warner Home Video release Doki Doki School Hours. Early in his career, he also appeared in drama CDs, with credits including Utau Tainoi and Ore no Mono!.

In anime, Yamauchi is confirmed to have voiced the character Kotaro Takidani in the two-part original video animation series After... The Animation, which was released in 2007 and 2008. A Japanese anime and game database also lists him as the voice actor for Tōyama Yukinojō and Takidani Kōtarō in the series Yamato Nadeshiko Shichi Henge.