What does Japanese native ancient dance mean?

Ancient dance mainly includes primitive worship dance. The primitive dance of offering sacrifices to gods includes funeral custom dance and praying for blessings. Funeral custom began in primitive Japan. There is a record in the Japanese history book "Ancient Stories" that "the boy in the sky died, singing and dancing for eight days and eight nights", which reflects the situation of Japanese primitive ancestors singing and dancing when they died. After death, there is no hurry to be buried. First, several women sang and danced in front of the body, and beat the pestle and rice before burial. According to textual research, this custom is very similar to that of Yunnan ethnic minorities in China, as described in Qian's Biography of Bai Yi in Ming Dynasty. From a bronze pier unearthed in Kagawa Prefecture, Japan, we can know the image data of this kind of song and dance beating in front of the body. Bronze burial is a primitive percussion instrument, which is mainly used in Japanese primitive activities such as offering sacrifices to gods. The bronze pier is painted with two people hitting the pestle together. The funeral custom dance in Japan may be related to the harvest sacrifice.