MOL awarded – “WIPO” for National Invention Award 2025

Mitsui O.S.K. Lines, Ltd. (MOL) has been recognized for its groundbreaking invention of a height-adjustable rigid wing sail designed for wind-assisted propulsion ships. This innovation earned the WIPO Prize at the 2025 National Commendation for Invention, hosted by the Japan Institute of Invention and Innovation. The award highlights MOL’s commitment to sustainable shipping practices, as the company aims to equip 25 vessels with this technology by 2030 and 80 by 2035.

Innovative Sail Technology and Environmental Impact

The patented invention, known as the “Invention of a rigid wing sail with height adjustment for wind assisted propulsion ships” (Patent No. 5318008), allows for the conversion of wind energy into propulsion, significantly reducing reliance on fossil fuels. Currently, two vessels, the Shofu Maru and Green Winds, are already utilizing this advanced system, with plans for seven bulk carriers and two LNG carriers to follow suit. This innovative hard sail can be extended and retracted, enabling adjustments to its height and optimizing the aerodynamic efficiency of the vessel.

Installed on the 100,000-DWT coal carrier Shofu Maru in October 2022, the hard sail has demonstrated impressive fuel savings, achieving an average reduction of 5% to 8% per voyage and up to 17% per day. This technology not only enhances operational efficiency but also contributes to the reduction of greenhouse gas emissions, aligning with MOL’s “Environmental Vision 2.2.” The company is committed to promoting decarbonization within the maritime industry, leveraging the Wind Challenger technology to foster a more sustainable future.

Suction Wings Wind-Assisted Propulsion in the Marine Industry: An Overview

Acknowledgment and Future Plans

The award ceremony is set to take place on July 1, with Her Imperial Highness Princess of Hitachi Hanako of Japan in attendance. The recognition of MOL’s innovation underscores the importance of advancing eco-friendly technologies in shipping. The award was shared with key contributors, including Kazuyuki Ouchi, CEO of Ouchi Ocean Consultant, Inc., and Kiyoshi Uzawa, Director of the Innovative Composite Materials Research & Development Center at Kanazawa Institute of Technology.

As MOL continues to implement this cutting-edge technology across its fleet, the company aims to lead the way in reducing greenhouse gas emissions and promoting sustainable practices in the maritime sector. With a clear roadmap for the future, MOL is poised to make significant strides in the decarbonization of shipping, setting a benchmark for the industry.