The country's best-supported side have launched "Project Eagle," which involves the use of falcons, to keep the web-footed invaders at bay.
"We have had problems with ducks for a while," Urawa's public relations chief Daisuke Maruyama said on Tuesday. "They leave their mess on the pitch.
"We've taken a number of measures to clean things up, including falcons and putting out cones on the pitch. The things you have to do sometimes!"
