
According to the records, the temple was built by Gyoki in 718 during the Nara period. An inscription engraved inside the main hall states that the main hall began its construction in 1286 during the Kamakura period. It was reconstructed in 1307, and was listed as a National Treasure in 1955.
The five-by-five bay hall has a single-eave hip roof covered in cypress bark. The wayo-style structure has circular columns supporting the roof with dense two-tier bracket sets. The inner shrine and worship area of the hall is divided by lattice doors. A miniature shrine houses the Medicine Buddha Triad flanked by the Twelve Yaksa Generals. This hall displays architectural features of Vajrayana Buddhist halls between the Kamakura (1185–1333) and Muromachi (1392–1573) periods.
For more details, go to the Encyclopedia of Buddhist Arts: Architecture A-F, page 200.