Feudalism is a social structure. they had the shogun that led to the rise of feudalism in japan. Three art forms are, calligraphy, another is painting, and a third is poetry. How these things changed society is they let them learn how to write. The social structure is, the emperor is on the top, the shogun is under the emperor, the diamyos and samurai are next then the peasant, the next one in line is artisans, last is merchants.