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June 13, 2024 Tsuneishi Shipbuilding Co., Ltd. (Fukuyama, Hiroshima, Japan; Representative Director: OKUMURA Sachio) announces that it commercialises the Rigid Sail as a new device for energy-saving in cooperation with Mitsui E&S Shipbuilding Co., Ltd. (Minato-ku, Tokyo, Japan; Representative Director: KOHATAKE Yasunori) and Akishima Laboratories (Mitsui Zosen) Inc. (Akishima, Tokyo, Japan; Representative Director: IGARASHI Kazuyuki). The Rigid Sail has wing-shape sail that keeps the shape even in wind. It is auxiliary propulsion devices that generates propulsive force and saves energy using offshore wind as natural energy. This Rigid Sail can be installed on existing vessels with minimal modification. To aim at realisation of retractable Rigid Sail, shape, arrangement and control system of the Rigid Sail are studied and designed. Our group plans to install it on an actual vessel in 2026 and commercialise it in 2027. TSUNEISHI SHIPBUILDING will coordinate the entire development project and design and manufacture the equipment, Mitsui E&S Shipbuilding will study the control system and sail shape, and Akishima Laboratories will carry out performance evaluation using fluid analysis (CFD analysis) and other methods on the developed Rigid Sail. 
Image by Tsuneishi Shipbuilding Co. Ltd.
Tsuneishi Shipbuilding Co., Ltd. Tsuneishi Shipbuilding (HQ: 1083 Tsuneishi, Numakuma-cho, Fukuyama, Hiroshima, Japan) engages in shipbuilding and repairs, and is the anchor company of the TSUNEISHI Group, which conducts business mainly in the shipbuilding industry and maritime transport. With manufacturing bases in Japan (Tsuneishi Factory, the HQ), Philippines, and China, the company builds bulk carriers, container carriers, tankers, etc. Company info: https://www.tsuneishi.co.jp/english/ Company ESG: https://www.tsuneishi.co.jp/esg/en/ Representative Director, President and Chief Executive Officer: OKUMURA Sachio Business: Shipbuilding and repair Founded: July 1917 (Taisho 6) Capital: 100 million yen Employees: 817 (as of 1st January 2024) Headquarters: Fukuyama City, Hiroshima Prefecture, Japan (Main Factory) Shipbuilding Business Affiliates: TSUNEISHI HEAVY INDUSTRIES (CEBU), Inc. (Cebu, Philippines) http://www.thici.com/ TSUNEISHI GROUP (ZHOUSHAN) SHIPBUILDING, INC. (Zhejiang, China) http://www.tsuneishi-zs.com/en/ TSUNEISHI IRON WORKS Co., Ltd. (Fukuyama City, Hiroshima Prefecture, Japan) https://www.tsuneishi-iw.jp/ TSUNEISHI ENGINEERING Co., Ltd. (Fukuyama City, Hiroshima Prefecture, Japan) http://www.tsune-e.com/ MIHO SHIPYARD Co., Ltd. (Shizuoka City, Shizuoka Prefecture, Japan) http://www.mihozosen.co.jp/ KANDA DOCKYARD Co., Ltd. (Kure-shi, Hiroshima, Japan) https://kandadock.com/ Mitsui E&S Shipbuilding Co., Ltd. (Minato-ku, Tokyo, Japan) https://www.tsuneishi.co.jp/mes-s/ YURA DOCKYARD Co., Ltd. (Yura, Hidaka-gun, Wakayama Prefecture, Japan) https://www.yuradock.co.jp/en NIIGATA SHIPBUILDING & REPAIR, Inc. (Niigata City, Niigata Prefecture, Japan) https://www.tsuneishi.co.jp/nsr/ Akishima Laboratories (Mitsui Zosen) Inc. (Akishima, Tokyo, Japan) https://akishima-labo.co.jp/en/ Tsuneishi Shipbuilding Co. Ltd. press release 
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