Japan's feudal-era caste system was part Confucianism and part Shintoism. Buddhism had nothing to do with it. https://en.wikipedia.org/wiki/Edo_society#Four_c

Japan's feudal-era caste system was part Confucianism and part Shintoism. Buddhism had nothing to do with it. https://en.wikipedia.org/wiki/Edo_society#Four_class_order https://en.wikipedia.org/wiki/Edo_society#Four_class_order https://en.wikipedia.org/wiki/Kegare https://en.wikipedia.org/wiki/Kegare