云井龙之助，Kumoi was born on Tokyo in 1903. In 1924, he joined Toa Cinema under the name of Kumoi Jun. He appeared in Numata Koroku's Zankan (To Slay the Wicked), said to be the first work of a nameless newcomer, and he also appeared in Kinugasa Teinosuke's Jashumon no Onna with Kojima Yozo.