Answer:
The European Feudalism was based on a law of Germany, Japanese Feudalism was based in a law from China. In Japan they had Samurai and in Europe they had the knights. In Europe the samurai had a military rank, the feudalism there was about military costumes. It was a way for make the society being structured around relationships.
In Japan the feudalism happened when the government became weak, and the powerful people had to fight to definite each other's land.