When the Imperial Court was in short of money, daimyo donated their money asking for an official rank in return and the Imperial Court often issued one which was higher than their family status in return.
朝廷が資金的に窮迫すると、大名達は献金の見返りとして官位を求め、朝廷もその献金の見返りとし、その武家の家格以上の官位を発給することもあった。