Also the blind who practiced as moneylenders were allowed to lend money with higher interest rates than normal from the Genroku era so that the blind could earn money for early promotion, which came to be recognized as a social problem in the late 18th century, because they lent money to poor gokenin (an immediate vassal of the bakufu) and bakufu hatamoto (direct retainers of the bakufu) and profiteered from them.
また早期の昇官に必要な金銀を得させやすくするために元禄以降、金銭貸付業としても高い金利が特別に許され、貧しい御家人や旗本をはじめ町人たちからも暴利を得ていた検校、勾当もおり、18世紀後半には社会問題化したこともある。