Kusaikei or Artificial Rock Garden

Quick answer：

Kusaikei, also known as an artificial rock garden, is a traditional Japanese garden style that emphasizes rocks, raked sand, and occasionally plants. These gardens are designed to evoke a sense of tranquility and the natural beauty of mountains and seas, even in urban settings. The practice involves meticulously arranging rocks and raked pebbles to represent landscapes, often with a focus on creating a minimalist and meditative environment.