Sankin kotai, a system whereby daimyo alternated residency between Edo and their domain, also helped the shogunate keep control of the daimyo.
各地大名必须轮流返回江户居住的参觐交代也更好的帮助德川幕府控制下属大名。
This system was improved by the Hj family, which took control of the shogunate on Yoritomo's death.
赖朝死后，幕府实权落到北条家族手中，对这个体系做了修正。
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