Yūta Mochizuki (望月 祐多, Mochizuki Yūta, born 14 March 1967) is a former Japanese actor and voice actor. He is best known for playing Geki/TyrannoRanger in Kyōryū Sentai Zyuranger and the titular character of Kamen Rider J. He also voiced Keisuke Harukaze in the Ojamajo Doremi franchise, Thierry Rothschild in Ashita no Nadja, and Akira Mimasaka in Boys Over Flowers. ()