Koki Oshima is a 30-year-old professional football player from JPN. He currently plays for Ventforet Kofu, wearing the number 29 shirt. He plays primarily as a Forward. He stands at 177cm tall and weighs 66kg. His preferred foot is Right. His current market value is estimated at 300K .

His most recent move was a Free from Tochigi SC to Ventforet Kofu on 2025-01-20.

In the J2/J3 100 Year Vision League 2026 season, Koki Oshima scored 0 goals and provided 2 assists across 4 appearances, averaging 0 goals per game with 4 shots attempted and 0 on target.