Match the Japanese period with its characteristics.
1.Kofun
introduction of Buddhism; emergence of Japanese identity
2.Asuka
burial mounds; arrival of Chinese and Korean immigrants; introduction of the horse; flourishing of Chinese language and culture
3.Nara
emergence of a strong Japanese government; creation of the waka written language
4.Heian
The Tale of Genji; yamato-e; assertion of authority by aristocracy; emergence of warrior clans; bushi; samurai