He joined J1 League club Vissel Kobe based in his local from youth team in 2000.
In March 2001, he moved to Japan Football League (JFL) club Otsuka Pharmaceutical (later Tokushima Vortis).
On 22 August 2023, Ōshima return to Kagoshima United since two years ago as manager.
[1] On 2 December 2023, Ōshima brought his club promotion to J2 League after draw 1–1 against Gainare Tottori and finished 2nd position.
This biographical article related to a Japanese association football forward, born in the 1980s is a stub.