Tokimasa devoted himself to establishing the Kamakura bakufu, and after his son-in-law Yoritomo was appointed to seii taishogun (literally, "great general who subdues the barbarians"), he gained the status of powerful gokenin (an immediate vassal of the Shogunate).
時政は鎌倉幕府の創立に尽力し、頼朝が征夷大将軍に任じられると、有力御家人としての地位を得る。