Karesansui, also known as Zen rock garden, is a Japanese garden design that emphasizes the use of natural elements such as rocks, sand, and moss to create a tranquil and meditative space. It originated in the 14th century during the Muromachi period, influenced by Zen Buddhism. Karesansui design focuses on simplicity and the concept of wabi-sabi, which celebrates imperfection and the beauty of natural aging.