Key Facts
• June 26, 2025: Imabari Shipbuilding announced acquisition of JMU shares.
• Imabari’s stake in JMU increases from 30% to 60%, making JMU a subsidiary.
• Combined group holds 50% domestic market share in shipbuilding.
• JFE Holdings and IHI reduce their stakes in JMU from 35% to 20% each.
• Acquisition cost remains undisclosed, pending regulatory approval.
• Imabari aims to cut costs and boost efficiency through scale expansion.
• JMU specializes in ship design and naval vessels, with shipyards in Yokohama and Kure.
• Imabari, founded in 1901, operates 10 shipyards and builds various ship types.
• Japan’s shipbuilding market share fell from 40–50% in the 1990s to under 20% today.
• Government supports shipbuilding as a key economic security industry.
• U.S.-Japan trade talks include shipbuilding cooperation as a major theme.
Summary
Imabari Shipbuilding, Japan’s largest shipbuilder, announced on June 26, 2025, its acquisition of additional shares in Japan Marine United (JMU), raising its stake to 60% and making JMU a subsidiary. This move creates a dominant group with 50% of Japan’s shipbuilding market share, aiming to counter competition from Chinese and South Korean manufacturers. Imabari plans to leverage JMU’s ship design expertise to enhance efficiency and reduce costs. The acquisition aligns with Japan’s strategy to revitalize its shipbuilding industry, which has seen its global market share decline significantly since the 1990s. The government views shipbuilding as critical to economic security and supports industry consolidation. The deal also complements ongoing U.S.-Japan trade negotiations, where shipbuilding cooperation is a key focus.
