Mitsubishi Launches First Large Ferry ‘KEYAKI’ for Shinnihonkai

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Mfame Editor
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  • Mitsubishi Shipbuilding has launched KEYAKI, Japan’s first ferry featuring a buttock-flow stern hull with a ducktail, enabling a 5% energy saving.

  • The vessel will operate between Otaru and Maizuru starting December 2025, supporting Japan’s modal shift to eco-friendly sea transport.

  • KEYAKI incorporates advanced roll-damping systems and innovative hull designs, enhancing energy efficiency and stability.

KEYAKI: A Milestone in Japanese Ferry Innovation


On April 29, 2025, Mitsubishi Shipbuilding Co., Ltd., part of the Mitsubishi Heavy Industries Group, held the christening and launch ceremony for the new ferry KEYAKI at the Enoura Plant in Yamaguchi Prefecture. Ordered by Shinnihonkai Ferry Co., Ltd. and Japan Railway Construction, Transport and Technology Agency (JRTT), KEYAKI is the ninth ferry built by Mitsubishi for the operator and will begin service in December 2025 on the Otaru–Maizuru route.

Innovative Hull Design for Energy Efficiency


KEYAKI is Japan’s first ferry to feature a cutting-edge energy-saving hull design that includes a KATANA BOW, buttock-flow stern, and a ducktail extension. These modifications reduce water resistance and improve fuel efficiency, delivering an estimated 5% energy saving compared to previous vessels.

To further enhance operational efficiency and stability, the ferry uses a combined roll-damping system. It includes an anti-rolling tank, which counteracts rolling motion with shifting water inside the ship, and fin stabilizers, movable fins that generate lift to reduce rolling from waves.

Supporting Japan’s Modal Shift to Sea Transport


Japan is advancing a modal shift toward sea transport to reduce CO₂ emissions and alleviate pressure from a declining truck driver workforce. Ferries like KEYAKI are key to this transition, offering an environmentally responsible and logistically practical alternative to road transport. Mitsubishi Shipbuilding’s commitment to building high-performance, eco-friendly ferries positions it as a major contributor to sustainable marine logistics.

KEYAKI’s Specifications:

  • Type: Passenger-carrying car ferry

  • Length Overall (LOA): Approx. 199 meters

  • Beam: Approx. 25.5 meters

  • Gross Tonnage: Approx. 14,300 tons

  • Service Speed: Approx. 28.3 knots

  • Passenger Capacity: 286

  • Vehicle Capacity: Approx. 150 trucks and 30 passenger cars

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Source: Mitsubishi Heavy Industries