However, because the Daigokuden stood beyond the Ryubidan with Shuran (red painted guard railings) on the boundary, a step called 'Ryubi-do' was used for passage between the Daigokuden and the Chodoin.
ただし大極殿は龍尾壇上に建っており、その境界には朱欄（朱色の手すり）が設けられ、朝堂と大極殿とは「龍尾道」と呼ばれる階段で往来した。