The Shibukawa clan was a branch family of the Ashikaga clan, and additionally, the lawful wife of Yoshiakira ASHIKAGA, the second Shogun of the Muromachi bakufu (Japanese feudal government headed by a shogun), was from this clan.
渋川氏は足利氏の支流であるばかりでなく、室町幕府2代将軍足利義詮の正室の生家でもあった。