A general term for streams built in the garden. In shinden style gardens of the Heian and Kamakura periods, streams are called yarimizu. Streams are generally built to supply water to ponds or for drainage, but considerations are also made in their construction for shore protection and the effect of the gradient on current speed. There are gardens in which the stream plays the main role instead of a pond.
Japanese Garden Dictionary: A Glossary for Japanese Gardens and Their History
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