Under the statute, up to 4 emperors removed, relatives are still considered as members of the Imperial Family, those who are more than 5 emperors removed are not considered as members of the Imperial Family, however they still have the rank as emperor and receive the On I of the Jugoinoge (Junior Fifth Rank, Lower Grade), those with more than 6 emperors removed are not allowed to have the rank of the emperor. (However the rank was changed in March 706.)
律令においては、4世王までは皇親となり、5世王は皇親とはならないものの王号を有し従五位下の蔭位を受け、6世王は王号を得られないものとされた（もっとも、慶雲3年2月の格で変更あり)。