Koonji Temple Kannon Hall

The Nail-Free Hall of Kaizuka

The Koonji Temple Kannon Hall (孝恩寺観音堂) is a Buddhist hall of the late Kamakura period in Kotsumi, Kaizuka City, Osaka Prefecture, and was designated a National Treasure on November 14, 1953 (Agency for Cultural Affairs).

The Agency records a single-storey hall five bays square with a hipped roof of tiles; it was first protected in 1903; designation number 00148.

The Last Hall of Kannonji Temple

According to the Agency for Cultural Affairs, temple tradition counts the hall as part of Kannonji, one of forty-nine temples founded by the monk Gyoki. Its buildings burned in the wars of the Sengoku period, leaving only this hall, and the temple was merged into Koonji in the Taisho era. The date of the hall is unknown, but its style points to the late Kamakura period.

The Osaka Convention and Tourism Bureau notes that Koonji is a Jodo temple founded in 1655, which took over the hall and its Buddhist statues on merging with neighbouring Kannonji in 1914. The hall is called Kuginashi-do, the hall without nails, and is among the oldest wooden buildings in Osaka Prefecture. A major restoration was completed in 2022.

Why It Is a National Treasure

The Agency notes that, while based on the traditional Japanese style, it mixes in newer features, using tie-beams in place of nageshi rails and paneled doors of the continental type, making it an important example of the new Japanese style of the Kamakura period. The frog-leg struts between the brackets, with well-developed carved patterns inside, rank among the finest of the period.

What to Look For

The five-bay hall has a three-bay inner sanctuary with a one-bay outer hall in front, ringed by a one-bay aisle (Agency for Cultural Affairs). Look for the frog-leg struts between the brackets and the distinctively moulded brackets in the outer hall.

The roof is laid with gyoki-buki tiles, an unusual overlapping style (Agency for Cultural Affairs).

Visiting

According to the Osaka Convention and Tourism Bureau, Koonji is a 20-minute walk from Mizuma-Kannon Station on the Mizuma Railway. A festival for the 1300th anniversary of its founding, with a special showing of the statues, is held on November 22 and 23, 2026 (1,000 yen; Koonji, telephone 072-446-2360). Check usual visiting arrangements with the temple.