As the nickname suggests, one of the highlights of "Sanmon" is when the set of Sanmon Gate of Nanzen-ji Temple comes up from below the stage by the mechanism of seri (trapdoor), and if there were no seri, Hisayoshi couldn't appear on the stage and the story couldn't go on.
『山門』はその通称が語るように南禅寺山門がせり上がるところが大きな見所だが、そもそもこのせり上げができないと久吉が舞台上に登場できないので話にならない。