According to the record of "Chiba Taikeizu (Genealogy of the Chiba Family)", Tsunehide was consequently appointed as Kazusa Shugo (the Governor of Kazusa Province); therefore, some suggests the possibility that he succeeded the head position of the Kazusa clan instead of the descendants of Hirotsune KAZUSA, who was killed by MINAMOTO no Yoritomo; but there is no reliable evidence to prove.
更に『千葉大系図』には上総守護に補任されたと記されており、源頼朝に討たれた上総広常の子孫に代わって上総氏の地位を継承したとする見方もあるが明証はない。