Feudalism was about having trust.You need trust to make it work out. for example, the emperor or shogun gave the daimyos land. The daimyo paid the samurai, and the peasants gave food all around. It was good for Japan because it was helpful, it pertained to everyone, even the peasants. Its what most systems are made for, like a feudal system. The shogun came first, then the daimyos, after the samurai, and last peasants. It helped keep structure in life.