However, in various provinces, incidents, in which fudokoku became putrid, occurred one after another; it was because the fudoso was kept sealed so strictly; the warehouses virtually had been left alone for a long time in spite of the fact that there was a regulation that the rice in the husk kept in the fudoso had to be changed regularly (the maximum interval was 9 years) to prevent the putrefaction.
ところが、倉庫令では倉庫内の穀は一定期間（最長で9年）ごとに中身を入れ替えて腐敗を防止する規定があるにも関わらず、不動倉の封印が厳重であったために、封印後は放置された状況となり、各地の不動倉で不動穀が腐敗するという事件が相次いだ。