In Kobe, seiyo-kan buildings that were built in the Meiji period are called ijin-kan buildings (former residences of early foreign settlers), while those that were built during the Taisho period and during the Showa period prior to the start of the Second World War are called yo-kan buildings.
神戸では明治期のものを異人館、大正～昭和戦前にかけてのものを洋館と呼んで区別している。