Shinto is a temple. It's empty aside from that, and that is the purpose itself. Since it was talked of that way just before, what is empty does not have Ego. It's not that there is a method to it, but if you can follow the lack of Ego you are safe. Forces of nature will prey on those who have Ego, the bigger the Ego the more of an insect parasite you are, and no one cares what happens to insects, except biologists. Well, insects as a species are important, but you get the idea ;)
Or do you? The race is empty of Ego, when all the souls are removed, only race remains. It's actually the same to us, but of course those who played along with us and made this possible will stay around. Souls aren't super important, except for the fact that with no souls, it's a planet of bugs and not a human planet. Then we can't eat, we won't "eat the bugs".
Christian Ritual is the ritual practice within Christianity. It is a mix of ancient Egyptian religion and Rosicrucianism. By now it can be said: Rosicrucians are the real jews, and they are birds. That is why their noses are big, it's a beak. But they are incarnated as humans so they don't have beaks. End of that mystery. What Moses spread was Rosicrucianism as interpreted within Egyptian religion, this became Kabbalah. Christianity is an alien religion with strong metaphysical archetypes, hence Rumia is a Christian. When all of this is added, it's Christian Ritual, an Earth local practice which doesn't exist elsewhere. If something is a Demon in Christianity, it's also allowed, because Ritual is void of content. Good or evil doesn't matter. You can employ Baal Ze Bub as your guide and it's still Christian Ritual, because he is part of the lore and a recognized demon.
Buddism is intermixed with Japanese culture, but the main Buddhism is not our thing, it's a Chinese perversion of Hinduism. Only Zen Buddhism is allowed because its ritual is seamlessly interlinked with Shinto and Karate by now. Karate is also a void ritual, as well as other "meaningless" martial arts. Put your attention to what was said here.