Hidenari Ugaki (宇垣 秀成, Ugaki Hidenari, born July 25, 1963) is a Japanese actor and voice actor from Tokyo.
He is currently affiliated with 81 Produce.
He is best known for his roles as Argo Gulskii in Mobile Fighter G Gundam, Donatello in the TV Tokyo edition of Teenage Mutant Ninja Turtles, Kaminari-san in the 2005 Doraemon series, and Goro Majima in the Yakuza video game series.