Katsumasa Chiyo (千代勝正, Chiyo Katsumasa, born 9 December 1986 in Tokyo, Japan) is a Japanese factory racing driver, currently competing in the Autobacs Super GT Series as a factory driver for Nissan. He is a graduate of the Nissan Driver Development Program (NDDP), and a past champion of the Bathurst 12 Hour race, and the GT World Challenge Europe Endurance Cup.