This will probably get closed pretty quickly as "not a real question", but for what it's worth:
In contexts where people refer to China and Japan as "the East", they also typically refer to Europe as "the West", not "the Center". So I don't see anything inherently chauvinistic about these labels. They just describe the relative geographical locations of the two places.
Yes, the labels are arbitrary in the sense that you can get to China from Europe by travelling west or to Europe from China by travelling east. But that's the historical accident of how people actually first travelled between the two. I presume that if the first contact between Europe and China had been people from China travelling east across the Americas, or people from Europe travelling west across the Americas, then Europe might be called "the East" and China "the West".
Of course that's not to say that there aren't people who are offended by the labels, or people who agonize over the possibility that others might be offended by the labels. That's the nature of modern American culture.