Koryu-ji is a single-sect Shingon Buddhist temple located in Hachioka-cho, Uzumasa, Ukyo-ku, Kyoto. The principal image is Prince Shotoku. It is also known as Uzumasa Koryu-ji, using the place name. It is the family temple of the Hata clan, who were immigrants, and is the oldest temple in Kyoto, existing before the capital was moved to Heian-kyo. It is known for housing the National Treasure, the Miroku Bosatsu Hanka Shiyui statue, and is also a temple of Prince Shotoku faith. The Ushimatsuri (Cow Festival) held on October 12th every year is known as one of the three major strange festivals in Kyoto. This offering is a set of two items: the Miroku Bosatsu goshuin (temple seal) and a history booklet. It is famous for the National Treasure Miroku Bosatsu statue. It is the oldest temple in Kyoto, said to have been founded in the 11th year of Emperor Suiko (603). According to the Nihon Shoki (Chronicles of Japan), it was founded by Hata no Kawakatsu, a naturalized clan member, who enshrined a Buddhist statue given to him by Prince Shotoku as its principal image. This Buddhist statue is the Miroku Bosatsu Hanka Shiyui statue, which has an eternal smile, and is enshrined in the Reiho-den (Treasure Hall). The Reiho-den houses a large number of ancient Buddhist statues from the Nara period to the Kamakura period, making it a treasure trove of ancient Buddhist art.