According to TIPS, Furude Rika, the head of one of the Great Houses, once asked to have the lock changed to a simple lock because the original was difficult to open. Kimiyoshi Kiichirō, another head, complied and had the lock changed to a more simple type. It is speculated that because of this change, Tomitake was able to pick and open the lock, breaking into the shrine. It is also the source of the villages belief that they were the cause of the illegal entering and the reason for their own disappearance, as it wouldn't have been broken into if the lock was the original heavy version, and thus Oyashiro-sama took them as punishment.