In shinto(Japan's original religion), people believe ther are spirits in nature and worship natural things, such as waterfalls, rocks, mountain, and trees.
Burakumin: Japan’s Invisible Race
The Burakumin: Japan’s Invisible Race
10. Ancient Japan - The Gateway - The torii is a major symbol of the Shinto religion in Japan. It is most commonly found at the entrance of a Shinto shrine, where it symbolically marks the transition from the profane to the sacred. A similar purpose was served by the pylon in ancient Egypt, and the great trilithons in Megalithic Europe.
In Japan Christianity had very few converts. Many converted to Shintoism.