Kusatsu suiseki paving cross-section

Quick answer：

Kusatsu suiseki, or dry landscape rock garden, is a traditional Japanese garden feature that uses carefully arranged rocks, raked gravel, and sometimes sand to represent a landscape. The 'paving cross-section' refers to the cutaway view of the surface materials and underlying structure of such a garden. This can provide insights into the design principles, construction techniques, and materials used in creating a kusatsu suiseki garden.