Pressing the Play button on Tomoko Iwata's potted plants will make "another ground" appear, and people will become members of an art village surrounded by the works of Takao Yamada. The artworks of these two turn the surface of the earth into their own playing surface evolving with the involvement of visitors. It is fine to fulfill the itch to explore or to have a rest under the tarp. The West Ground is also designated as a disaster-prevention park, and people can improve their ability to survive by participating in the "art-based disaster prevention drills" held there.