is a former Japanese football player.
Playing career Koishi was born in Tosu on August 22, 1977. After graduating from Rissho University, he joined the J2 League club Sagan Tosu based in his local area in 2000. He played often as a forward during his first season and made his first appearance on 30 March. In 2003, he played as an offensive midfielder. However he was not played in 2005. In 2006, he moved to the Japan Football League club ALO's Hokuriku. He retired at the end of the 2006 season.
Club statistics Club performance League Cup League Cup Total Season Club League Apps Goals Apps Goals Apps Goals Apps Goals Japan League Emperor's Cup J.League Cup Total2000Sagan TosuJ2 League224202026420011960000196200231310-323200329010-300200439210-40220051000-102006ALO's HokurikuFootball League163--163 Career total15718502016418
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