Carrera Stadlbauer MIZUMI Oyakata Watergun This MIZUMI Oyakata is a new generation of watergun! This revolutionary new design includes a folding sight! Oyakata stands for Master and Power, and that is just what this water-gun is! The Oyakata tank volume s 1.3 liters, and shoots about 10 meters. Tons of fun at the park, pool or beach!