Hiroomi Tosaka (登坂広臣) is a Japanese singer, actor and performer. He is the main vocalist of
三代目 (Sandaime) J Soul Brothers and he joined the group by winning “Vocal Battle Audition 2” with Ryuji Imaichi (今市隆二). Currently, he is signed to LDH Records.

First, he debuted as an actor in August 2014 by playing the character Hiroshi Haruyama from the romance film Hot Road. He then debuted as a solo singer in July 2017 by releasing his first solo single “Wasted Love,” featuring Afrojack.

In 2021, he moved his solo project to LDH Records and formed CDL entertainment so he could produce music by himself. After moving to CDL, he changed his stage name to ØMI.