The buried cultural property package (Maizozuzai Hoichi) is a place where valuable archeological sites are buried underground. What was discovered in the Sumaura Park was that in the basement of the Sumitomo family’s residence, "the treasure may be asleep" in 2019 (the first year of the first year). It turned out that the basics of the building remain in a fine state. Unfortunately, the treasure was not found, but the place was designated as a wrapping area and still sleeps under the dust square as a valuable cultural property.