Nagara-san Onjo-ji , also known as just Onjo-ji, or Mii-dera (三井寺), is a Buddhist temple in Japan located at the foot of Mount Hiei, in the city of Ōtsu in Shiga Prefecture. It is a short distance from both Kyoto, and Lake Biwa, Japan's largest lake. The head temple of the Jimon sect of Tendai, it is a sister temple to Enryaku-ji, at the top of the mountain, and is one of the four largest temples in Japan. Altogether, there are 40 named buildings in the Mii-dera complex.