Feudalism was a system of hierarchy which was concerned with reciprocal legal and military obligations during medieval times. During those times neither Europe nor Japan shared a direct contact of this class system. However, Japanese and European societies developed a system of hierarchical classes (lords, knights, peasants, etc) which were very similar. At that time, when a person completed a feudal activity, he received the title of "knight" in Europe and "Samurai" in Japan.