大阪商業大学
Takagi was educated at and played for Kunimi High School and Osaka University of Commerce. After finishing the university in 1990, he joined Japan Soccer League side Fujita Industries (current Shonan Bellmare). He moved to Mazda (current Sanfrecce Hiroshima) in 1991 and was awarded the JSL Young Player of the Year in 1992. His partnership with Czech Ivan Hašek up front was so successful that Hiroshima won the second stage of J1 League in 1994.