The Shofu Maru (2022) is the first bulk carrier with a Wind Challenger hard sail. The Wind Challenger Project was developed by the Tokyo University in cooperation with Mitsui O.S.K. Lines (MOL) en Oshima-shipbuilding. The Shofu Maru is testing the system with a single mast. Next project can be a bulker that will be delivered in 2024 and maybe gets extra rotor sails from Anemoi Marine Technologies.