Mitsui O.S.K. Lines, Ltd. (MOL) today announced that MOL and Oshima Shipbuilding Co., Ltd. have jointly obtained "Approval In Principle (AIP)" from Nippon Kaiji Kyokai (ClassNK) for the design of a hard sail system. The system converts wind energy to propulsive force with telescopic hard sail, and is a fundamental technology of the "Wind Challenger Project" that MOL and Oshima Shipbuilding are spearheading to reduce greenhouse gas (GHG) emissions by using wind energy. It is estimated that emissions will be reduced by 5% on a Japan-Australia voyage, and about 8% on Japan-North America West Coast voyage. The long-term goal is to develop a widely accepted solution to achieve the IMO target in combination with other measures to reduce GHGs by equipping vessels with multiple sails.