While residents from the upper nobles, such as the Fujiwara clan, gathered in northern Sakyo, the poor went over to the eastern limit of Heian-kyo and started living next to the Kamo-gawa River (the Yodo-gawa river system).
藤原氏のような上流貴族の宅地が左京北部へ密集する一方、貧しい人々は平安京の東限を越えて鴨川(淀川水系)の川べりに住み始めた。