The front gate of Kokubun-ji Temple is the work of a great carpenter Matsuda Taemon in 1739. The front gate was constructed with donations from four people including Kobayashi Giemon, who was a tedai (clerk) of Hasegawa Tadataka, a daikan (local governor) of Hida.

With a particularly beautiful roof shape, good examples of the architectural style in the middle period of the Hida region can be observed in the kurigata (molding) of udegi (brackets) and kaerumata (frog-leg struts) on kabuki (the upper crossbar that connects both end of a gate pole). Originally, without any kidan (stone or earth platform that supports the building), the gate was erected directly on the earth surface, but the kidan was constructed for preservation. In 1977, the gate was designated as a cultural property of Takayama City. In 1978, the roof built with pastry board roofing was renovated into one built with a copper sheet roof.