* Feudal society: Japan adopted a feudal system of government during the Heian period (794-1185), in which power was decentralized and local lords (daimyo) controlled large areas of land. This system was influenced by Chinese political and social institutions.
* Samurai class: The samurai were a class of warriors who served the daimyo and formed the backbone of Japanese society. They were known for their loyalty, honor, and martial skills.
* Buddhism: Buddhism was introduced to Japan from China in the 6th century and quickly became the dominant religion. It influenced Japanese culture, art, and literature, and helped to unify the country.
Korea
* Centralized government: Korea adopted a centralized system of government during the Goryeo period (918-1392), in which power was concentrated in the hands of the king and his bureaucracy. This system was also influenced by Chinese political and social institutions.
* Yangban class: The yangban were a class of aristocrats and scholars who served the government and owned most of the land. They were known for their Confucian values and their emphasis on education.
* Confucianism: Confucianism was introduced to Korea from China in the 4th century and became the dominant ideology of the yangban class. It influenced Korean culture, politics, and society, and helped to maintain social order.
Comparison
The social development of post-classical Japan and Korea differed in several ways. Japan adopted a feudal system of government, while Korea adopted a centralized system. Japan also had a more decentralized society, with power shared among local lords, while Korea had a more centralized society, with power concentrated in the hands of the king. Finally, Japan was more influenced by Buddhism, while Korea was more influenced by Confucianism.