Hirashima Kubo (or Awa Kubo) is descended from Yoshitsuna ASHIKAGA, the second son of Yoshizumi ASHIKAGA who was the 11th Seii Taishogun (literally, "great general who subdues the barbarians") of Muromachi bakufu (Japanese feudal government headed by a shogun), and their family lineage is a branch family of the Shogun family succeeded by Yoshimi, Yoshitane and Yoshitsuna ASHIKAGA successively.
平島公方（ひらしまくぼう）（又は阿波公方）は、血統的には室町幕府11代征夷大将軍・足利義澄の次男足利義維の末裔で、家柄的には、足利義視から義稙、そして義維と続く将軍家別家である。