In addition, there was the otsukaiban in O-oku (the inner halls of Edo Castle where the wife of the Shogun and her servants reside), who served as liaison officer between the Midaidokoro (wife of the Shogun) or other high-ranking woman servants and the shogunate administrators.
なお、大奥にはこれとは別個に御台所や大奥の上臈と役人との連絡にあたる「御使番」が設置されている。