This proposal explores the possibility of expressing new boundaries through a combination of materials in response to the dilution of boundaries due to the transformation and disappearance of the moat encircling the area. In the five areas along the moat, we will experiment with a variety of materials, such as pebbles and rocks to create a state beach, bamboo bushes and rocks to create a layered boundary, and aquatic plants to create a biotope. By abstractly combining natural materials to form characteristic boundaries and connecting them to the unique topography and water system of each site, we aim to create a new spatial experience in the modern age while maintaining the original function of the moat encircling it.