...the language and the arts with my comparison...

I thought about going this way, but I decided to stick with what I know.

Since sarcasm seems to have failed, let me just state flatly that all of the cultures we've mentioned have enough members and enough diversity that blanket assertions such as, "Japanese martial arts are worse than Chinese ones," or "American football is a cheap knockoff of rugby" are reductive and parochial to the point of not-even-wrongness.