Kaisei Ishii is a 26-year-old professional football player from JPN. He plays primarily as a Forward. He stands at 174cm tall and weighs 65kg. His preferred foot is Right. His current market value is estimated at 25K €.

His most recent move was a from Gimhae City to Yeoju FC on 2025-07-24.

In the Korean K League 3 2025 season, Kaisei Ishii scored 0 goals and provided 0 assists across 1 appearances, averaging 0 goals per game with 0 shots attempted and 0 on target.