At first it was limited to Kinmon gates (14 gates in the outer wall that encloses Daidairi), but after TAIRA no Shigeko in 1169, palace gates (7 gates in the wall that encloses the outer Dairi), inner gates (12 gates in the inner wall that encloses the middle Dairi) and naikakumon gates, as well as the names of gates of Chodoin (an office at the Heijo-kyo Palace) and Burakuin were used.
始めは禁門（大内裏を囲む外郭十四門）に限られたが、嘉応元年（1169年）の平滋子以降は宮門（内裏の外重を囲む外郭七門）や内門（内裏の中重を囲む内郭十二門）、内閤門、その他朝堂院・豊楽院の門名なども取り入れられた。