Yūji Ueda (うえだ ゆうじ, Ueda Yūji; born June 15, 1967) is a Japanese actor, voice actor and singer from Fukuoka Prefecture, Japan. He is best known for voicing the roles of Sagara Sanosuke in Rurouni Kenshin, Akito Tenkawa in Martian Successor Nadesico, Valerino in the 1992 series of Calimero, Takeshi/Brock and Sonansu/Wobbuffet in Pokémon, Horohoro in Shaman King, Johannes Krauser II in Detroit Metal City, Kōhei Oguri in Zipang, Keitarō Urashima in Love Hina, Shiro Iori in Kill la Kill, and Yousuke Fuuma in Wedding Peach.

Yūji Ueda was born in Fukuoka as 上田祐司 (same pronunciation). In July 2004, he left Arts Vision and officially made his name into an all-hiragana form. In April 2005, Ueda joined Office Osawa.

Yūji is frequently called "Yū-chan" by veteran voice actresses; usually co-voice actresses from Pokémon.

He is married to voice actress Omi Minami. In March 2012, Ueda and Minami both left Osawa, and launched a new agency called PomaRancz.