WASHINGTON — May 1, 2026 : The U.S. Department of Defense has initiated a formal assessment of Japanese and South Korean naval shipbuilding capabilities as part of a broader effort to accelerate expansion of the United States Navy fleet. The initiative, included in the proposed fiscal year 2027 budget, allocates $1.85 billion for a feasibility study examining the outsourcing of selected warship design and construction elements to allied shipyards in East Asia.
The study will evaluate options ranging from direct construction in allied facilities to hybrid production models and technology transfer frameworks. The proposal specifically focuses on integrating proven foreign hull designs into U.S. naval procurement pipelines to address persistent industrial constraints within domestic shipyards.
Strategic Context and Production Gap
The assessment is being conducted against the backdrop of a widening disparity in naval production capacity between the United States and the People’s Liberation Army Navy. The U.S. Navy currently maintains a fleet of fewer than 300 deployable vessels, significantly below its long-standing force structure objective of at least 355 ships.
In contrast, China’s naval fleet has surpassed 370 warships and is projected to reach approximately 460 vessels by 2030. Chinese shipbuilding infrastructure, supported by dual-use commercial and military facilities, enables sustained high output. Current estimates indicate that Chinese yards can produce between six and ten destroyers annually, with overall shipbuilding tonnage capacity assessed at roughly 232 times that of the United States. A single large Chinese shipyard is reported to rival the combined output of all U.S. naval shipyards.
Domestic Industrial Constraints
The U.S. shipbuilding sector continues to face structural challenges that have constrained fleet expansion. Domestic output represents less than 0.1 percent of global commercial shipbuilding tonnage, reflecting decades of reduced industrial investment.
Key limitations include workforce shortages driven by an aging labor base, outdated shipyard infrastructure, and recurring cost overruns across major programs. Maintenance backlogs have further strained available capacity. Ongoing procurement efforts, including the Virginia-class submarine and the Constellation-class frigate, have experienced delays of up to three years, with projected unit costs exceeding $1 billion in some cases.
Allied Shipbuilding Capabilities
Japan and South Korea are the world’s second- and third-largest shipbuilders, accounting for approximately 15 percent and 28 percent of global shipbuilding output, respectively. Both countries have established expertise in modular construction techniques, efficient production timelines, and cost-effective delivery of naval platforms.
The feasibility study will prioritize evaluation of two specific vessel classes:
Mogami-Class Frigate (Japan)
The Mogami-class frigate is a 5,500-ton multi-mission platform featuring a reduced radar cross-section and a high degree of onboard automation, allowing for smaller crew requirements. The design emphasizes flexibility for anti-submarine, mine warfare, and surface operations. Construction timelines average approximately two years per vessel, with unit costs estimated near $500 million.
Daegu-Class Frigate (South Korea)
The Daegu-class frigate is a 3,600-ton platform optimized for anti-submarine warfare. It incorporates a hybrid propulsion system designed to reduce acoustic signatures, enhancing survivability in contested environments. The class is also recognized for rapid production cycles and scalability.
Both vessel types are compatible with U.S. naval combat systems, including the Mk 41 vertical launching system (VLS), facilitating integration into existing fleet architectures without extensive redesign.
Study Scope and Implementation Models
The Department of Defense study will assess multiple pathways for incorporating allied shipbuilding capacity into U.S. naval programs. These include:
- Construction of complete vessels in Japanese or South Korean shipyards
- Joint production models combining foreign design with U.S.-based assembly
- Technology transfer arrangements enabling domestic construction using allied designs
- Incremental approaches, in which initial ships are built overseas, followed by licensed production in U.S. facilities
The evaluation will also draw on precedents such as cooperative shipbuilding programs within the United States Coast Guard, where foreign design input has been incorporated into domestic production.
Legal and Political Considerations
Current U.S. law mandates that Navy warships be constructed in domestic shipyards, with limited exceptions. Implementing foreign construction or co-production would require either congressional amendments or a presidential national security waiver.
The proposal is expected to encounter resistance from stakeholders within the domestic shipbuilding industry, including labor organizations and lawmakers representing shipyard regions. Industry representatives have argued that existing U.S. industrial capacity can meet requirements with sufficient investment and policy support.
Parallel Industrial Strategy
In parallel with the feasibility study, the Department of the Navy has encouraged allied defense firms to establish a presence within U.S. shipbuilding infrastructure. This approach aims to integrate foreign expertise while maintaining compliance with domestic construction requirements.
A notable development in this effort is the acquisition of the Philly Shipyard in Pennsylvania by South Korean conglomerate Hanwha Group for approximately $100 million. The investment is intended to facilitate the transfer of production methodologies and improve efficiency within U.S.-based facilities.
Budget Context and Next Steps
The $1.85 billion feasibility study is part of the Department of the Navy’s broader FY2027 shipbuilding request totaling $65.8 billion. The budget includes procurement plans for 18 battle force ships and 16 auxiliary vessels.
Additional studies within the same budget cycle are examining foreign design and construction pathways for future surface combatants, including frigates and destroyers. While the Pentagon has not specified timelines for decision-making following the study, recent maintenance and overhaul work conducted by Japanese and South Korean shipyards on U.S. Navy vessels—particularly within forward-deployed fleets—has provided a basis for expanded industrial cooperation.
The Department of Defense has not released further operational or contractual details, and final implementation decisions remain contingent on the study’s findings and subsequent legislative considerations.
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