In view of the past history, it is considered that the deed was already invalidated in 1146, but it is also considered that since Chikamori's daughter was a concubine of TAIRA no Shigemori, the deed was presented in an expectation of support from the Taira family.
これまでの経緯からすれば、この新券は既に久安2年の時点で無効になったと考えられるが、親盛の娘は平重盛の側室であり、平氏側の支援を期待して提示したとも考えられている。