Kasai Rinkai Park is a park in Edogawa, Tokyo, Japan, which officially opened on 1 June 1989. The park includes a bird sanctuary and the Tokyo Sea Life Park aquarium, as well as the Diamond and Flower Ferris Wheel. It was built on reclaimed land which includes two manmade islands, an observation deck and a hotel. It is the second-largest park in the 23 wards of Tokyo.