wow, I did not know that. What do they believe in mainly? Hinduism? Materialism..?
There is a semi-joke about Japanese religion, that the Japanese are born Shintoist, married Christian and die Buddhist.
The Japanese are very “flexible” about religion, perhaps because their traditional religion prior to the arrival of Buddhism and Taoism, and much later Christianity, was a sort of paganism-lite (traditional Shinto, prior to the enforce modernisation of the religion to merge it with the Imperial cult, strikes me as having been somewhere between animism and paganism — the kami aren’t quite “gods” in the sense of Greco-Roman or Norse paganism, even if “kami” is usually Englished as “god”.)