The Korokan was forced to move to the Shichi-jo Street (the seventh street) for constructing Toji and Saiji Temples during the Konin period (810-824), with the result that two guest houses were built on both sides of the Suzaku-oji Street, and named the Higashi-no-Korokan (east Korokan) and the Nishi-no-Korokan (west Korokan).
東寺・西寺の建立のため弘仁年間（810年-824年）に朱雀大路を跨いだ七条に東鴻臚館・西鴻臚館として移転。