Career
Kashiwa Reysol
Oshima made his official debut for Kashiwa Reysol in the J. League Division 1, J. League Cup on 9 October 2014 against Sanfrecce Hiroshima in Hiroshima Big Architecture in Hiroshima, Japan. In the 72nd minute Oshima subbed in for Leandro. Oshima and his club lost the match 2-0.