Many historians and other experts have considered Iesada's attitude against Yoshinobu was the direct result of the influence and intent of the O-oku's; the voice of the O-oku (either gleaned from several influential individuals or the consensus of its female residents) residents influenced Iesada on the matters of the Shogun's successor.
家定に影響を及ぼした大奥の意向を反映したものと考えられている。