The Ancient Chinese Culture and language are preserved in the Japanese society and to some extent in the Korean Society till this date. After the Yamato period, the Japanese did not have much relationship with the Chinese, Instead the created their own culture from the ancient Chinese culture, during the Heian period and the Higashiyama period. The Old Chinese literature is preserved in the Japanese language called Kanbun. The Japanese Elite studied Chinese literature( Kanbun).
But the Japanese considered their culture unique and you can find in history that the Japanese broke out of the Chinese Imperial tributary system many times. They dont agree Chinese as their Big Bro. After the Meiji Restoration, the Japanese nationalist attacked the relics of the Shoguns ( Ashikaga) , Because the Chinese bestowed them the title the Kings of Japan.