The Kawasaki Ninja 300, or EX300, is a 296 cc (18.1 cu in) Ninja series sport bike introduced by Kawasaki in 2012 for the 2013 model year. It is sold in Asia, Australia, Europe, and North America. When introduced, the Ninja 300R replaced the Ninja 250R in some markets, and in others they were sold alongside each other. When the 2018 model year Ninja 400 was introduced, it replaced the 300 in some markets.