The relations with the various power such as the Genji clan MINAMOTO no Yoshikata, the Chichibu clan of Musashi Province and the Ashikaga clan (the Fujiwara clan) got into the tensions during the process, while he partnered with MINAMOTO no Yoshitomo, the ruler of Southern Kanto region and his brother Yoshiyasu's brother-in-law, and MINAMOTO no Yoshihira (Yoshitomo's son) to marry his daughter to Yoshihira.
その過程で、源氏一族の源義賢、武蔵国の秩父氏、下野国の足利氏(藤原氏)といった諸勢力とは緊張関係に陥るが、一方南関東の支配者で弟義康と相婿でもある源義朝・源義平父子とは提携し、娘を義平の室としている。