Keikyu Corporation, also known as Keihin Kyūkō or, more recently, Keikyū, is a private railroad that connects inner Tokyo to Kawasaki, Yokohama, Yokosuka and other points on the Miura Peninsula in Kanagawa Prefecture. From Wikipedia
Health officials link the outbreak to staphylococcus aureus found in eel products sold at a Yokohama department store.
