Masami Kageyama (影山 正美 Kageyama Masami?, born May 2, 1967) is a Japanese racing driver from Kanagawa Prefecture. His older brother is Masahiko Kageyama who was also a successful racing driver in similar categories.
Kageyama began his career by winning the inaugural 1990 Formula Toyota championship. In 1991 he moved up to the All-Japan Formula Three Championship and finished fourth with one win. He embarked on a full-fledged touring car racing campaign in 1992, competing in the All Japan Touring Car Championship Class 3 in a Honda Civic, finishing 9th. He also continued in Japanese F3 but failed to finish in the points. He continued in the same series and teams in 1993, finishing 11th in JTCC-C3 and 15th in F3 Japan. 1994 was his breakout year in Japanese F3 where he drove for the famous Tom's team and finished second in points with 2 poles, one win and six podium finishes. He also drove in the All Japan GT Championship (JGTC) and made two starts in Japanese Formula 3000 in 1994.
In 1995 Kageyama raced full-time in both Japanese F3000, where he finished 13th in points with the Advan Sport Pal team, and in the Japanese Touring Car Championship where he finished 10th in points driving a Toyota. In 1996 Kageyama only raced in JGTC in a Nissan 300ZX and in JTCC in a Toyota Corona EXiV, however he also made his 24 Hours of Le Mans debut in a Toyota Supra. However, the team failed to finish. In 1997 Kageyama finished second in JGTC-GT500 in a Supra fielded by Toyota Team SARD. He also returned to Formula Nippon (formerly Japanese F3000) and finished fifth in the 1997 championship.