Honda already has the deck stacked, so they don't need to bring in all of their big guns. Kawasaki has pulled out, and Yamaha and Suzuki haven't updated their bikes and are only using local Japanese riders for the race. They don't have any serious world class talent to put on those bikes anyway, with the possible exception of Ryo. Honda has 4 teams running, and the serious competition only has 2 in total.