Our lavatory designs draw on a continuous quality improvement program that solicited response from major airlines. The result: comfortable spaces that provide significant cost and weight savings—all while assuring you of reliable service, flight after flight. Yokohama is the exclusive provider of Boeing 757 lavatory modules and a key manufacturer of 737 lavatory modules, producing more than 11,000 lavatories for the B737 and more than 1,100 commercial ship-sets for the 757 over the past 20 years. Our lavatory modules and spare parts are fully FAA certified for both new production and retrofit applications. High-performance designs. Custom design and retrofits are available.