Katsuyuki Nakasuga is a Japanese motorcycle racer. He races a factory Yamaha YZF-R1 in the JSB1000 class of the All Japan Road Race Championship. He has won the Suzuka 8 Hours four times and the JSB1000 championship title twelve times.

The Yamaha YZF-R1, or simply R1, is a 998 cc (60.9 cu in) sports motorcycle made by Yamaha. It was first released in 1998, undergoing significant updates in 2000, 2002, 2004, 2006, 2007, 2009, 2015, 2018 and 2020.