Osaka University of Commerce
Kajii was born in Kagoshima Prefecture on July 11, 1963. After graduating from Osaka University of Commerce, he joined Japan Soccer League club Matsushita Electric (later "Gamba Osaka") in 1986. He played as regular player and the club won the champions 1990 Emperor's Cup. In 1992, Japan Soccer League was folded and founded new league J1 League. However he played in only 1992 J.League Cup, he retired end of 1992 season before started league competition in 1993.