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 250K €.

His most recent move was a Free from Tochigi SC to Ventforet Kofu on 2025-01-19.

In the Japanese J2 League 2025 season, Koki Oshima scored 2 goals and provided 0 assists across 31 appearances, averaging 0.1 goals per game with 14 shots attempted and 4 on target.