When Emperor Seiwa was enthroned in 876 and took up residence in the southern part of Somedono, the building was renamed and became designated residence of the Imperial Prince.
清和天皇が貞観_(日本)18年（876年）の譲位後、染殿の南部分を御在所としたのに伴い改称され、皇子親王の住院として定めた。