WIND WHALE: Supporting Offshore Wind Supply Chains with Japan's First Coastal Deck Carrier

Solutions

As offshore wind power projects continue to expand, the importance of logistics infrastructure has grown alongside demand for wind turbines themselves.

In July 2026, MOL Group completed the construction of WIND WHALE, Japan’s first coastal deck carrier (heavy-lift vessel).

Unlike conventional cargo vessels, WIND WHALE features a vast flush deck designed to accommodate a wide range of oversized and heavy cargo. In particular, the vessel is expected to play an important role in supporting supply chains for offshore wind power projects, where transportation demand is increasing as turbine components continue to grow.

The vessel measures 149.9 meters in length and 30.0 meters in breadth. Its cargo area features a flush deck, a completely flat loading surface with no protrusions, enabling the safe transportation of offshore wind components as well as various long and heavy cargoes.

Viewed from above, the scale of the vessel becomes even more apparent. The cargo deck covers an area equivalent to approximately 15 tennis courts. This extensive loading space allows efficient transportation of monopiles and other large offshore wind power components, making WIND WHALE a valuable solution for specialized marine transportation.

A photo gallery at the end of this article showcases the vessel’s spacious deck and distinctive design in greater detail.

In addition to offering greater seakeeping qualities than conventional non-self-propelled barges, WIND WHALE is equipped with a Dynamic Positioning System (DPS).

This technology enables the vessel to maintain its position while operating offshore. Looking ahead, the vessel is expected to support direct cargo transfers to Wind Turbine Installation Vessels (WTIVs) working at offshore wind construction sites.

The vessel is also equipped with a battery-assisted electric propulsion system, reflecting consideration for reduced environmental impact.

The name WIND WHALE reflects both the vessel’s powerful transportation capabilities supporting Japan’s offshore wind industry and its image as a massive carrier navigating the open sea while transporting heavy cargo, much like a whale crossing the ocean.

The MOL Group continues to advance its offshore wind power-related businesses by leveraging extensive expertise in shipping and logistics. Through the operation of WIND WHALE, the Group seeks to contribute to the expansion of renewable energy and the realization of a more sustainable society.

Special Cargo Transportation

Mitsui O.S.K. Lines, Ltd. (MOL) provides optimal solutions for marine transportation needs, supporting transport of heavy and oversized cargo with multi-purpose vessels, while encompassing a broad range of associated services, including customs clearance, land transportation and equipment installation.

Service Overview Materials (project and heavy cargo transportation)

The MOL Group provides end-to-end logistics solutions for heavy-lift and oversized cargo, covering ocean transportation, customs clearance, inland transport, and installation support. Download materials from MOL Logistics Co., Ltd., an experienced provider of project cargo logistics.

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