In no cho was the direct political institution of Daijo Tenno (the Retired Emperor) who took the reins of Insei (a cloister government) or the institution that handled shomusata (trial dealing with land-related issues) and zatsumusata (trial dealing with civil affairs) of Nyoin (woman bestowed with the title "in") in Japanese ancient and medieval period.
院庁（いんのちょう）は、日本の古代・中世において、院政を布いた太上天皇直属の政務機関、または女院の所務沙汰・雑務沙汰を処理した機関。