This device is worth mentioning in the history of theater because this enables to create a three-dimensional space by making an actor come out from the stage, where is a two-dimensional space for the audience, and appear in the space where the audience is located.
観客から見て二次元的な存在の舞台上から、役者が客席側に出ることで三次元的な演出を可能にしている点で、演劇史上特筆すべき装置といえる。