One similarity between the cultures of traditional china and traditional japan was that

One similarity between the cultures of traditional china and traditional japan was that the two cultures share a religious element that, although aware of the existence of one or more gods, focuses on the worship of non-supreme beings such as Buddhism in China and Shintoism in Japan.

Explanation:

Although in China and Japan they have religions that worship gods or magnanimous beings that exceed human rationality, two of their most representative religions: Buddhism in China and Shintoism in Japan, focus on worshiping the teachings of human beings who have existed and that in one way or another they have contributed in a beneficial way to their predecessors, in the case of Buddhism the teachings of the Gautama Buddha are followed and it is about reaching the Nirvana level, while in Shintoism the spirits of the nature, which is really the ancestors that have taken a new ethereal form capable of leading people to the right path.

answer; disconfirm the catharsis theory;

using the bering strait was the best transportation system.