On June 6, 2012, he debuted as a solo singer by releasing the album "NEW GAME".
He uses the aliases of Takama Mirokuin and Yuusuke Ishikawa when credited on adult rated medias.
He announced his marriage to Satomi Sato on July 6, 2017.
He is a fan of Love Live!, and is a big Rin Hoshizora fan.
He once joined the kendo club when he was on junior high school due to the influence of Rurouni Kenshin anime which aired at that time. On high school, he joined the drama club.
Terashima made his debut in 2005 anime Genesis of Aquarion in which he played Apollo, the main character of Genesis of Aquarion.
He had belonged to Holypeak until December, 2008, and to Production Baobab until August, 2011.
Terashima graduated from Tokyo Announce Gakuin, voice training school.