Heian-no-Yansui is a famous place located in the precincts of Daikakuji Temple in Ukyo-ku, Kyoto, which conveys the garden culture of the Heian period. Yarimizu is a man-made stream or waterway in a garden, and aristocrats in the Heian period (794-1185) enjoyed the elegant flow of poems and sake cups into such waterways. The Yansui at Daikakuji Temple was built together with Osawa Pond, which is said to have been modeled after Lake Dotei in Tang China by Emperor Saga, and it is strongly influenced by the Tang culture of the time. This Yansui (water source) drew water from the Nakoso Waterfall and flowed through the garden into the Osawa Pond. It is said that Nakoso Falls was established in the Taki-den Garden at Saga-in, a detached palace, and that it was created by Kawanari Hyakusei. However, by the end of the Heian period, the waterfall dried up and lost its function as a waterfall. Today, the garden can be enjoyed as a reminder of the garden culture of the time. The Daikakuji waterfall and Osawa Pond were designated as a national place of scenic beauty in 1923, and every year around the time of the harvest moon in mid-autumn, a “moon-watching evening” is held at Osawa Pond, which attracts many visitors.