The Kawasaki Ninja 400 as currently available in Japan, is a sleeved down ER6 (ER6F) model. The whole Kawasaki ER6 model line was replaced by Kawasaki a few months ago. The 2018 Kawasaki Ninja 400 for Japan will likely be the same as the international model that replaces the Kawasaki Ninja 300.
Is the new Kawasaki Ninja 400 not just the Ninja 400 they sell in Japan?