Daimyo shonin seido was the system that the Edo bakufu (Japanese feudal government headed by a shogun) held hostages from feudal loads and their senior vassals and put them up in Edo.
大名証人制度（だいみょうしょうにんせいど）は江戸幕府が大名およびその重臣から人質をとって江戸に住まわせた制度。