is a former Japanese football player.
Playing career Kosaka was born in Fukui Prefecture on September 14, 1975. After graduating from Komazawa University, he joined the Japan Football League club Omiya Ardija in 1998. He played often as a midfielder during the first season and the club was promoted to the new J2 League in 1999. However he did not play as often in 2002 and he retired at the end of the 2002 season.
Club statistics Club performance League Cup League Cup Total Season Club League Apps Goals Apps Goals Apps Goals Apps GoalsJapan League Emperor's Cup J.League Cup Total1998Omiya ArdijaFootball League23930-3291999J2 League22233112662000212102024220012341010254200210000-100Total9917834111121
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