Through the collective efforts of Masako and a few political puppets, laws governing the shōgun's court in the early 13th century allowed women equal rights of inheritance with fraternal kin.
Melalui upaya kolektif Masako dan beberapa boneka politik, undang-undang yang mengatur pengadilan shōgun pada awal abad ke-13 memungkinkan perempuan menyamai hak warisan dengan saudara fraternal.