This main hall is the successor of the main hall described as a “five-room lecture hall with a cypress bark roof” in the “Enki Shizai-cho” (chronicles) of Kanshinji Temple in 883, and is thought to have been rebuilt in the early Muromachi period. The hall faces south, with a length of 7 ken (about 12,5m ) and a beam of 7 ken, and is of Irimoya construction(Hipped roof and gables) with a tiled roof (classic tiles Hongawara). The inner sanctuary consists of an outer sanctuary in the front with two spans, an inner sanctuary in the centre with a room disposition of five by four spans, side sanctuaries on each side of the inner sanctuary, and a rear sanctuary with one span of width. The inner sanctum is three spans by one at the back, and the inner sanctum is made of a closet with a Buddhist altar. The main image of Nyoirin Kannon is enshrined there. In front of the altar, on the left and right sides, there is a mandala wall. It is a typical example of an eclectic style Buddhist temple, incorporating both Japanese and Zen styles.