Kusashi Water Lantern

Quick answer：

Kusashi Water Lanterns, also known as 'Karesansui' or 'dry landscape lanterns', are traditional Japanese lanterns that represent a serene, minimalist water garden. They often feature a flat, dry rock landscape with a lantern placed in the center. These lanterns symbolize the beauty of nature and are used in Zen gardens to evoke a sense of calm and contemplation.