Career
He participated in the Japanese Grand Touring Carolina series in the top category between 1993 and 2002. Along with Nissan Motorsports teammates Aguri Suzuki and Kazuyoshi Hoshino, he drove a Nissan R390 GT1 to a third-place finish at the 1998 24 Hours of Le Mans. Kageyama is the Chief Executive Officer of M-Proto Incorporated., a supplier of brake pads, based in Fujisawa, Kanagawa.