I don't think cities providing manure for farming communities is unique to Japan, my understanding is it was standard for cities until modern era Bret Devereau

I don't think cities providing manure for farming communities is unique to Japan, my understanding is it was standard for cities until modern era Bret Devereaux mentions it in his description of pre-modern cities https://acoup.blog/2019/07/12/collections-the-lonely-city-part-i-the-ideal-city/ https://acoup.blog/2019/07/12/collections-the-lonely-city-pa...