Kazusa Kokubun-ji

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Kazusa Kokubun-ji is a Buddhist temple in Ichihara, Chiba, Japan. It belongs to the Shingon-shu Buzan-ha sect, and its main image is Yakushi Nyōrai (the Medicine Buddha). It was the provincial temple (kokubunji) of Kazusa Province, established by Emperor Shōmu in 741 AD to spread Buddhism and support imperial rule.

The exact founding of the current temple is unclear, but it is said to be the successor of the original Nara-period kokubunji, which fell into ruin in the Muromachi period. The Nara temple ruins were found in 1929 and are protected as a National Historic Site; more discoveries led to expanded protection in 1979.

The kokubunji system was created in 741 to promote Buddhism and standardize provincial administration. Kazusa Kokubun-ji stood near the Yōrō River, in an area with many ancient burial mounds and nearby sites.

Details about its foundation are unclear. It appears in records during the Ōei era (1394–1427) but later declined. It was revived in the Edo period (Genroku era, 1688–1704). The present main hall, the Yakushi-dō, was built in 1716 on the old temple site. The Niō-mon gate and many statues date from the Edo period, with one inner statue surviving from the Nanboku-chō period.

In 1929, many roof tiles inscribed kokubun-ji were found at the site. Excavations in 1966 confirmed foundations for the Kondō (main hall), a Lecture Hall, the middle gate, and a pagoda. The pagoda was likely seven stories tall, about 60 meters high.

Roof-tile kilns were found west of the main complex in 1974. The temple grounds form a trapezoid, about 478 meters long north-south and 254–345 meters wide, totaling around 139,000 square meters. The inner area with the main buildings measures about 219 by 194 meters. Its layout differs from the standard Todai-ji plan and seems inspired by Daikandai-ji in Asuka, suggesting it may have been a pre-existing temple reused as a kokubunji.

Models of the temple are on display at the Chiba Prefectural Museum and Information Center and at Ichihara City Hall. The Yakushi-dō, the two Niō statues in the Niō-mon gate, and a stone memorial to Taira no Masakado are designated Tangible Cultural Properties by Ichihara city.

Kazusa Kokubun-ji is about a 15-minute walk from Kazusa-Murakami Station on the Kominato Line.