This dive site is located on the Miyagi Coast of Chatan Town, Okinawa Prefecture. Located in front of the Chatan Water Treatment Plant, there is a device that inhales and exhales seawater at a depth of about 13 meters. It looks like a UFO. When the water purification plant is in operation, warm water is produced from this underwater device, which makes the water around the site a little warmer. Boat diving and shore diving are available.