The direct descendants of Yorinobu, who later became the mainstream, solidified their position as the head of the samurai family with the eastern samurai groups under their control, and in the era of MINAMOTO no Yoritomo, they founded the Kamakura bakufu (Japanese feudal government headed by a shogun) and established the samurai government.
後に主流となった頼信の嫡流が東国の武士団を支配下に置いて武家の棟梁としての地位を固め、源頼朝の代に鎌倉幕府を開き武家政権を確立した。