Ibigawa Rock is a type of volcanic conglomerate that is formed by the fusion of different rock types under the heat of a volcano. It is a popular choice for bonsai enthusiasts because it has an attractive color, shape, and texture that resembles natural landscapes. Ibigawa Rock is often used for planting bonsai on rock, a technique that involves attaching the roots of the tree to the crevices or holes of the rock and covering them with soil or moss. This creates a stunning effect of a miniature tree growing on a mountain or cliff. Planting bonsai on rock requires careful selection of the rock and the tree, as well as proper maintenance of the water and fertilizer levels.