Is there a traditional culture of eating shit in Japan?

There are also many taboos in the Japanese diet: generally, they don't eat fat meat and pig offal, and some people don't eat mutton and duck; When entertaining guests, it is forbidden to fill the rice too full, nor to fill it with a spoon and a bowl; Taboo guests eat a bowl is enough, only eating a bowl is considered as a symbol of no chance; It is forbidden to tidy clothes or touch your hair when eating, because it is unsanitary and impolite;

I hope this helps.