What are differences between China and Japan, regarding culture and tea?

Unlike China, which underwent much cultural upheaval and military campaigns, Japan remained relatively untouched through the centuries, and thus gained an appreciation of all three types of tea making. By the 15th century, the tea ceremony is an established custom. The "Sung" movement of Whipped Tea continued in Japan unlike China. The tea ceremony adopted a central and quasi-religious significance; in the author's words, "Teaism was Taoism in disguise" (18).