Kasai Rinkai Park (葛西臨海公園) is a huge expansive park situated along the Tokyo Bay. It houses the Tokyo Sea Life Aquarium, Bird sanctuary, 117m tall ferris wheel, bbq grounds, biking and walking paths, a japanese garden, small playground and plum and cherry blossoms.
Tokyo Sea Life Park is a modern Aquarium located on the border of Tokyo and Chiba on the Bay of Tokyo. You can study sharks, eagle rays, and penguins.
Must-see: A 2,200-ton bluefin tuna tank.