is a former Japanese football player and manager.
Ishii was born in Kanagawa Prefecture on May 26, 1959. After graduating from Nihon University, he joined Nissan Motors in 1982. In 1988, he moved to Otsuka Pharmaceutical.
In 1988, player Ishii also became an assistant coach at Otsuka Pharmaceutical. In 1993, he was promoted to manager. In 1997, he moved to Consadole Sapporo and became an assistant coach. In October 1998, manager Hugo Fernandez was sacked and Ishii was promoted to manager. In 2003, he moved to Vegalta Sendai. In September, he managed as caretaker.