But with her pedigree as a daughter of the Saito clan, a warrior house, Kasuga no Tsubone was not qualified to enter the imperial court, so she tried to arrange to be adopted by Kinkuni SANJONISHI, who was both her blood relative (Tsubone was the great-great-grandchild of Kineda SANJONISHI) and had raised her when she was younger.
しかし武家である齋藤家の娘の身分のままでは御所に昇殿するための資格を欠くため、血族であり（春日局は三条西公条の玄孫になる）、また育ての親でもある三条西公国の養女になろうとした。