How much of Japan's traditional culture comes from China ?

[miles7tp]

Chinese, Indian or Arabic cultures are quite "pure" if you ask me.

If you study Chinese history, you can find that some different ethnic people ruled China by turns.

Undoubtedly ancient Chinese culture deeply influenced on old Asian culture.
Similarly, undoubtedly "ancient Greek culture", "ancient Egyptian culture", "ancient Roman culture" and "Islamic culture" made the base of European cultures.
You enthusiastically find a point in common between Japan and China. But in a point in common you will be able to find a cultural gap.

I don't want to think that you disregard the difference between Japan and China. If you do so, you will never understand Asian cultures. I don't want you to look down on Asian cultures.
Do you believe European people could develop "ancient Roman culture" but Asian people could NOT develop "ancient Chinese culture" for a long time ?

It seems to me that Japan grew as much of the Ancient Chinese civilisation as modern China, Korea or Vietnam. The roots are mostly the same, and these cultures now have more similarities than differences.

I advise you to study Asian history and culture harder.
And you will be able to notice diversity of Asian cultures.