An installation inspired by the formation process of the Shima’s potholes. Using Asama stones, metal fragments, liquids, and other materials collected from this area, the work explores the boundaries between erosion and being eroded, intention and unconsciousness, action and time—through the sounds and vibrations produced by materials rubbing against each other. Asama stones, often found along riversides and in gardens throughout Nakanojo, were once brought here by pyroclastic flows or human hands. Strongly acidic hot spring water is also used to display the gradual dissolution of the stones. This is an attempt to reflect the relationship between nature and humans—volcanoes, rivers, and daily life—through materials and their transformations.