Sankin-kōtai
Sankin-kōtai ( , now commonly written as ) was a policy of the Tokugawa shogunate during most of the Edo period of Japanese history . 
<triplet> Sankin-kōtai <subj> Edo period <obj> time period <triplet> Tokugawa shogunate <subj> Edo period <obj> time period <triplet> Edo period <subj> Japanese history <obj> part of