Yokoisada (Phils.) Corporation is a manufacturer of the common brand name NIPPON MASK, a registered trademark sold at market in the country Japan and a pioneer in mask making who continued to do market in Japan since 1958. The company aim to continuously satisfy present and future customers by producing good quality world class products, deliver on time exquisitely designed items with a competitive price through continuous product research and development while at the same time maintaining a harmonious employer-employee relationship and teamwork. Presently, the company is expanding its service by providing mask into the Filipino community.