Hitayoshi's Plan to Conquer China

Hitayoshe is absolutely convinced, not only of his plan to conquer china, but the feasibility of it. It's not exactly clear when this idea started forming in his head, but once it did, he couldn't get it out. Japan was at peace for the first time in a century. But that left an entire ration of samurai, career soldiers who devoted their whole lives to the art of killing. The sole meaning of their lives had been war. And with no outlet for their very particular set of skills, how long would it take for lesser lords under hitaoshe to start hatching schemes and ambitious plans of their own? How long before this idle population of samurai plunged