The present paper proposes a Sailing Wind Farm as main energy resource with small load on an environment. It sails around EEZ of Japan seeking appropriate breezing and avoiding meeting heavy storm like Typhoon. This is a concept of main energy resource of Japan to minimize environmental load when fuel cell and hydrogen will be available for daily life. A prototype design shows feasibility of safe sailing even in case of Typhoon and structural strength in storm. If Sailing Wind Farms, 3900 units of the prototype replace coal power plants, then we can obtain 18% of total electric power generation of Japan and reduce 10% of exhausting CO2 of the 2002 level.