Kusansui metal edging

Quick answer：

Kusansui metal edging refers to a design technique in Japanese garden aesthetics, where fine metal strips are used to outline or edge the 'kaisan' or stepping stones in a Zen rock garden. This method adds a touch of elegance and sophistication to the traditional Japanese dry landscape garden, known as 'kare-sansui'. The metal edging is often made of brass or copper and is carefully crafted to blend seamlessly with the natural stones and overall composition of the garden.