Kannonji Castle

Kannonji Castle (観音寺城, Kannonji-jō) was a Sengoku period yamashiro-style Japanese castle located in what is now the Azuchi neighborhood of the city of Ōmihachiman, Shiga Prefecture, Japan. The ruins have been protected as a National Historic Site since 1982, with the area under protection expanded in 1984. The castle was named after Kannonshō-ji, a Buddhist temple near the peak of the mountain.

Kannonji Castle is located on the ridgeline of Mount Kinugasa, a 400-meter mountain, not far from the ruins of Azuchi Castle. The castle is in proximity to Lake Biwa and to control both the Nakasendō and Tōkaidō highways connecting Kyoto with the eastern provinces, and the Hokkoku Kaidō highway connecting Kyoto with the Sea of Japan. The precise year the castle was constructed is uncertain, but it was constructed some time during the 14th century by the Rokkaku clan, a cadet branch of the Sasaki clan, a military house which rose to prominence in the Kamakura period. The Rokkaku held the post of shugo of Ōmi Province, but effectively controlled only the southern half of the province, as the northern half was dominated by a rival cadet clan, the Kyogoku clan.

A castle was needed as an administrative center and military rallying point. The ridged peak of Kinugasa Mountain, where Kannonsho-ji was already, was selected as the new site. A castle from that lofty position would command a view of the plains below and would serve as a symbol of power in the region. The castle was rebuilt during the Ōnin era (1467-1477); it was originally named Sasaki Castle.

Kannonji Castle was attacked and changed hands three times during the Ōnin War; twice in battles between the Rokkaku and the Kyogoku, and the final time in a struggle between rival branches of the Rokkaku clan itself. Under Rokkaku Takayori (d.1520), the clan was reunified, and significantly gained in strength as Rokkaku Takayori seized estates from nobles and Buddhist temples throughout his territories, with the backing of the Muromachi shogunate. Under his son, Rokkaku Sadayori (1495-1552), the territory prospered greatly by the abolishment of the local guild system in Ishidera, the castle town at the base of Kannonji Castle.

Text adapted from “Kannonji Castle” on Wikipedia, CC BY-SA 4.0.

Kannonji Castle ranks #1,579 of 7,738 worldwide in the atlas's castle fame ranking, and #92 of the 297 mapped in Japan. Founded 1468, it is older than 48% of the atlas's dated landmarks — one of 434 atlas entries founded in the 15th century. Its Wikipedia articles were opened 6,154 times in the last 60 days, more than 87% of the atlas. 6 more atlas landmarks stand within 25 km. The nearest day-trip guide is Higashiōmi, 6 km away. It is one of the 71 landmarks on the atlas's regional map of Kansai. See how Japan compares in the castle statistics.

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