Since his adopted son-in-law Yoshitoki HOJO became the second Shikken (shogunal regent) of the Kamakura bakufu (Japanese feudal government headed by a shogun), Tomomitsu's children were active as Yoshitoki's maternal relatives.
娘婿である北条義時が鎌倉幕府の2代執権となった事から、朝光の子らは義時の外戚として活躍した。