The "Kanpyo no Goyuikai" is a group of precepts for governing which the Emperor Uda wrote at the time of abdication toward the end of the ninth century; this document also mentions that fudokoku was just before extinction.
9世紀末に宇多天皇が譲位に際して書き記した『寛平御遺誡』にも不動穀が廃絶寸前であることが述べられている。