People are always curious to know which is the most popular or well-known religion in japan. Althogh there are different religions in Japan like Shinto, Japan’s earliest religion, Buddhism, and Confucianism. But if talking about the most popular religion, then Shinto and Buddhism are on the top. You can also read the details results of the survey in which the percentage of religions in Japan was covered. The link is provided above, so if you want to read you can!!