The main hall of Kokubun-ji in Takamatsu City, built in the Late Kamakura Period, was designated as a national treasure under the Ancient Shrines and Temples Preservation Act. During repairing undertaken in the Showa Era (1941-1943), change of the building's original form was permitted. This paper discusses restoration that aimed to return the building to its original form, clarifying that the pitch of the roof after the remodeling was representative of the Edo Period, and was different from the original. It is also clear that the syumidan and zushi were made in the Kanbun Era.
