Karesansui, Zen, application

Quick answer：

Karesansui, also known as dry landscape, is a traditional Japanese Zen garden style that emphasizes simplicity and mindfulness. It often uses rocks, sand, and sometimes moss to represent mountains, water, and other natural elements. Zen, or Zennichi in Japanese, is a school of Mahayana Buddhism that emphasizes meditation and insight. The application of karesansui in Zen gardens reflects the principles of Zen, promoting a sense of tranquility and meditation.