Also known as: 水中輪投げ, ウォーターゲーム
A water-based ring toss toy developed by Tomy during the 1970s. Upon being filled with water, players press a button on the side, which forces air through a tube into the main compartment and sends the rings flying. Many consider it a piece of childhood nostalgia given that it required a degree of skill to set all rings onto the pegs. Variants were developed and sold by Milton Bradley and other companies.