The Omiya gosho lying northeast of the sento gosho was originally built as the nyoin gosho (imperial palace of close female relatives of the emperor or a woman of comparable standing) for Tofukumonin, who was the chugu (wife of an emperor) of Emperor Gomizunoo.
なお、仙洞御所東北に隣接する大宮御所は後水尾天皇の中宮であった東福門院の女院御所として造営されたものが元となっている。