Karakusa grass lawn border

Quick answer：

Karakusa grass lawn border refers to the use of rock arrangements to define the edges of a Japanese Zen garden's grass lawn, known as 'karakusa.' The term 'karakusa' originates from the pattern of waves found in Japanese painting and translates to 'grass waves.' This design element is used to create a visual representation of flowing water without actually using any water, which is a characteristic feature of Zen gardens that emphasizes the beauty of simplicity and the transience of nature.