Some are derived from Indian culture such as Buddhism, Esoteric Buddhism and Hinduism, some originates from manners and customs of civilization in China such as five seasonal festivals and Nijushisekki (24 divisions of the old calendar), and in some cases these elements have been blended together with the Japanese traditional Shinto.
仏教、密教、ヒンドゥー教などのインド文化を起源とするものや五節句や二十四節気など中華文明の風俗習慣を起源に持つ物も存在し、それらが日本古来の神道と渾然一体となっているものもある。