However, since it took a greatly extended amount of time to receive such a promotion, in order to accelerate the acquisition of higher ranks, blind officers were authorized to trade gold and silver currency for higher ranks, which lead to the ranks being certified by the Todo-za.
しかしそのためには非常に長い年月を必要とするので、早期に取得するため金銀による盲官位の売買も公認されたために、当道座によって各盲官位が認定されるようになった。