The Greater East Asia Co-Prosperity Sphere Returns Without an Empire

America protects the map. East Asia protects the machine.

The Greater East Asia Co-Prosperity Sphere was one of the twentieth century’s most cynical political names. Imperial Japan presented it as an Asian order built on liberation, cooperation, and shared prosperity. In practice, it subordinated occupied territories to Japanese military power, extracted resources for the imperial war economy, and converted nominally independent governments into instruments of Tokyo’s command.[1] The language promised that Asia would free itself from Western empire by entering a Japanese one.

That project was destroyed in 1945. The strategic geography beneath it did not disappear.

Japan, Taiwan, South Korea, Singapore, the Philippines, and the wider maritime region have since become more functionally integrated than the imperial planners of the 1930s could have achieved through occupation. Their governments do not answer to one capital. Their populations do not imagine themselves as members of one political civilization. Their industries nevertheless operate as different organs of the same production machine. The old sphere tried to make Asia serve Japan. The emerging one makes the world depend on capabilities concentrated across East Asia.

The resemblance ends there. Imperial Japan began with sovereignty and tried to manufacture integration underneath it. Postwar East Asia began with production, trade, specialization, investment, logistics, technical standards, and accumulated operational trust. Political unity never arrived. It never needed to.

The region became coherent without becoming one.

The Two Hierarchies

The American alliance system in Asia now contains two hierarchies. Security dependence runs toward Washington. Industrial dependence runs back through Tokyo, Seoul, Taipei, and the wider maritime corridor.

The first hierarchy is visible. The United States maintains alliances with Japan, South Korea, the Philippines, and Australia. It supplies extended deterrence, long-range military power, intelligence, logistics, nuclear guarantees, and the naval presence that prevents any regional power from easily converting economic scale into territorial command. Taiwan’s survival calculations remain inseparable from American capability and political will. Singapore is not a treaty ally, but its security environment also rests partly on the wider balance sustained by the United States.

The second hierarchy sits beneath the first. American technology and military power depend on fabrication, memory, materials, industrial machinery, batteries, shipbuilding, repair capacity, ports, cables, and logistical routines concentrated across the same states that Washington formally protects. The United States remains upstream in military force, software, finance, design, and strategic permission. East Asia has become upstream in execution.

This creates a relationship that conventional alliance language describes poorly. A traditional protectorate runs on asymmetric dependence: the large power guarantees the security of the smaller territory, and the smaller territory accepts limits on its strategic autonomy. Protection moves outward from the center. Dependence moves inward from the periphery. In maritime East Asia, those directions increasingly cross. The protected states remain militarily dependent while the protector becomes operationally dependent on their industrial ecosystems.

This is reversed protection. It does not make the allies equal to the United States, and it does not erase Washington’s ability to impose export controls, condition technology access, pressure firms, or alter alliance terms. It introduces a second hierarchy running in the opposite direction. A power can dominate the rules of a system while depending on others to keep the system physically alive.

Command and execution separate. The commanding power controls permission. The supposedly subordinate states control whether permission can become reality.

Reversed protection exists only under demanding conditions. The capability located in the protected state must be difficult to reproduce within the strategic timeframe. Its loss must degrade the protector’s military, technological, or economic power. That dependence must alter the protector’s behavior toward the jurisdiction that contains it. Industrial importance alone is insufficient. Indispensability becomes protection when the cost of losing a capability exceeds the cost of preserving the political space in which it operates. The first two conditions are already visible. The third, a measurable shift in how Washington protects, exempts, subsidizes, or defers to the jurisdictions it depends on, is the one still forming. Small signs exist: the Navy has begun bending its own rules to route ship overhauls through allied commercial yards. Where that behavior generalizes, reversed protection becomes real; where it does not, indispensability is only leverage waiting to be used. For now the concept names a tendency the system is entering, not a settled feature of the alliance.

Even then, protection is not guaranteed. Concentrated capability can attract coercion as easily as deterrence. It can persuade a protector to defend the node, or persuade the protector to move the capability somewhere safer. Indispensability buys exposure in the same motion that it buys leverage.

The Machine and the Corridor

The sphere named here is not the entire East Asian economy. It is also not a closed bloc. Three terms carry separate weight in what follows: the machine is the global production system; the corridor is the allied portion of it engineered to stay available under fracture; the sphere is the political order that mutual dependence begins to produce as the corridor’s connections harden into arrangements.

The global production machine includes China, Europe, the United States, Southeast Asia, and firms distributed across dozens of jurisdictions. Chinese processing, assembly, batteries, machinery, shipping, and intermediate goods remain embedded throughout it. Dutch lithography sits beneath advanced semiconductor fabrication. American design software, capital, cloud platforms, and chip architecture remain wired into the same system. No politically honest map can draw a clean line around the machine.

Inside that global machine, however, an allied continuity corridor is beginning to emerge. The corridor consists of jurisdictions expected to keep critical layers operating under coercion, blockade, industrial disruption, or strategic conflict. Economic participation does not establish membership. Three tests do: the node’s removal must damage several linked systems; coalition partners must be unable to replace it quickly; and its capacity must remain politically available during the crisis the corridor is designed to survive.

This separates ordinary supply-chain participation from strategic indispensability. A large exporter can remain replaceable. A smaller economy can become systemically central when several operating layers have accumulated around capabilities that cannot be moved on command.

The corridor has an East Asian core but extends beyond East Asian geography. Japan, Taiwan, and South Korea are execution nodes. Singapore is a coordination node. Australia provides resources, energy, land, and strategic depth. The Philippines provides territorial access across the maritime routes linking Northeast Asia, the South China Sea, and the Pacific. The United States supplies design, capital, software, military protection, and permission architecture. The Netherlands remains an external technological anchor because advanced fabrication still passes through one country’s lithography ecosystem.

Malaysia, Vietnam, Thailand, Indonesia, and other regional states also occupy important positions, and the boundary can move as their capabilities deepen. The corridor is not a diplomatic club with permanent seats. It is a functional topology. States enter its core when their removal would degrade several layers of allied continuity at once.

The distinction between the machine and the corridor also explains China’s position. China remains materially inside the global production machine. It sits outside the allied continuity corridor because its capacity cannot be assumed to remain available during the conflict against which that corridor is being organized. The boundary is strategic availability, not civilization, ideology, or latitude.

The same standard cuts against the corridor’s most important member. Taiwan is its execution center, yet Taiwanese capacity is the most likely to become unavailable in the exact conflict the corridor exists to survive. Leading-edge fabrication concentrated on an island under blockade or bombardment fails the availability condition in the scenario that matters most. This does not remove Taiwan from the corridor. It marks Taiwan as the place where indispensability and exposure peak together, the node the system can least afford to lose and least reliably keep. The corridor’s central asset is also its central vulnerability, and alliance language does not dissolve that. It can be hedged only partly, and only before a crisis rather than during one, by building redundancy off the island while the ecosystem still holds.

The machine is global. The corridor is the part being prepared to survive geopolitical fracture.

The Anatomy of Execution

Japan’s position is concentrated in the layers that disappear from public view precisely because they work. Japanese firms remain deeply embedded in semiconductor equipment, silicon wafers, photoresists, specialty chemicals, packaging materials, precision machinery, sensors, industrial components, and advanced manufacturing systems. Japan no longer dominates the finished-chip market as it once did. Its leverage migrated into the inputs and tools without which fabrication elsewhere becomes harder.

Taiwan became the execution center of advanced semiconductor manufacturing. Its importance cannot be reduced to fabrication plants. The Taiwanese ecosystem includes yield knowledge, supplier synchronization, advanced packaging, engineering discipline, failure recovery, and trusted relationships with the world’s largest technology firms. TSMC’s scale makes the point visible: in 2025 it reported manufacturing 12,682 products for 534 customers across hundreds of process technologies.[2] The number matters because it reveals an operating environment, not simply a collection of factories.

South Korea occupies several adjacent layers: memory, high-bandwidth memory, electronics, batteries, displays, automobiles, steel, and high-value shipbuilding. As AI systems consume greater quantities of advanced memory alongside logic, Korean industrial capacity becomes part of the execution path from model design to functioning data center. Its shipyards also connect commercial manufacturing depth to the maritime capacity on which American power depends.

Singapore performs a different function. Its value is distributed across maritime services, aviation, finance, arbitration, corporate headquarters, data connectivity, and the routines through which regional actors route capital, ships, contracts, information, and trust. No single Singaporean object occupies the position of a leading-edge foundry. The node matters because too many systems use it to coordinate.

Australia and the Philippines show that industrial systems also require space. Australia’s minerals, energy, land, political alignment, and distance from the most exposed sections of the first island chain provide depth. The Philippines contributes ports, bases, cables, islands, and access across strategic sea lanes. One supplies resources and rear geography. The other supplies continuity across contested geography. Neither plays Taiwan’s role, but the machine cannot operate through fabrication alone.

These functions are different, and treating them as interchangeable would empty the concept of meaning. Execution nodes create or transform critical goods. Coordination nodes connect actors and transactions. Resource nodes supply upstream physical inputs. Access nodes preserve movement, repair, and territorial continuity. External anchors provide technologies or permissions the core cannot reproduce. The corridor becomes strategically significant because these functions link together.

This is not an empire. It is a machine without an emperor.

Three Tests of Reversed Protection

Semiconductors provide the clearest case. A processor designed in California may require fabrication in Taiwan, Japanese equipment and materials, Korean memory, advanced packaging, servers assembled across a wider electronics ecosystem, and logistics routed through regional ports and financial systems. American design leadership does not eliminate this dependence. It makes the dependence more consequential because the value of American intellectual property cannot become physical capability without the manufacturing environment beneath it.

TSMC’s expansion into Arizona demonstrates both sides of the mechanism. The company describes geographic expansion as a response to customer demand for flexibility and government support, and in 2025 announced additional American investment.[3] New capacity reduces concentration risk and brings advanced production closer to American customers. It also reveals how difficult genuine relocation is. A fab can be financed and constructed faster than the supplier density, engineering routines, managerial knowledge, packaging capacity, and failure-recovery environment that make the fab productive can be recreated.

Arizona therefore does not simply replace Taiwan. It extends a Taiwanese capability into the United States. Over time, extension can become replication, and replication can reduce Taiwan’s leverage. The strategic unit is not the factory. It is the coordination environment around the factory. Reshoring changes the hierarchy only when the ecosystem moves with the asset.

Shipbuilding provides a second test. The United States retains extraordinary naval technology and military reach, but its commercial shipbuilding base and repair capacity have thinned while South Korea and Japan preserved deep maritime industries. This is no longer an abstract argument about comparative advantage. In March 2025, the USNS Wally Schirra completed a seven-month overhaul at Hanwha Ocean in South Korea. The work included dry docking, hull-corrosion repairs, a full rudder replacement, and more than 300 separate work items. The U.S. Navy described in-theater maintenance as a way to reduce downtime and enhance readiness.[4] Japan crossed the same line weeks later. In April 2025, the USS Miguel Keith, an expeditionary mobile base, completed a five-month regular overhaul at Mitsubishi Heavy Industries in Yokohama, the first time a Japanese commercial yard won an overhaul contract of that scale for an American vessel.[5] A U.S. statute normally bars major overhauls in foreign shipyards; the work qualified only because it ran under six months and the ship was not due back in the United States within fifteen.

These cases do not prove that America has outsourced its navy to East Asia. They show the direction of dependence. Two allied commercial yards, one Korean and one Japanese, absorbed major overhauls that American yards could not clear without lengthening their own backlog, and the Navy used an existing statutory opening to make that division of labor possible and freed its own workforce to let that happen. This is industrial capacity the United States no longer holds at scale at home. Korean and Japanese yards can shorten repair cycles and supply endurance that procurement orders alone cannot summon. The protector’s operational readiness begins to pass through the protected states’ yards.

The 2019 Japan-South Korea materials dispute provides the negative case. Japan tightened export procedures for fluorinated polyimide, photoresists, and high-purity hydrogen fluoride, inputs important to Korean semiconductor and display production. South Korea brought the dispute to the World Trade Organization.[6] Two American allies occupying adjacent layers of the same industrial stack used their respective dependencies against one another.

The dispute exposed the limit of spontaneous integration. Distributed specialization had created mutual dependence, but no authority owned continuity across the system. The alliance map did not automatically govern the industrial machine beneath it. Political coordination failed at precisely the point where production had become strategically entangled.

The lesson is larger than the dispute. Indispensable nodes do not naturally form a resilient order. They can protect one another, coerce one another, or become points through which an external power fractures the system. Capability becomes continuity only after institutions decide how it will be allocated, protected, repaired, and restored under pressure.

China and Sovereign Closure

China offers a competing structure of industrial power. Its scale, domestic market, manufacturing depth, infrastructure financing, and state capacity allow more functions to be organized inside one political jurisdiction. Neighboring states trade with China, host Chinese investment, use Chinese equipment, and remain exposed to decisions made in Beijing. Yet China is not a single factory directed from a control room. It contains provincial competition, redundant industrial clusters, private tacit knowledge, and an enormous internal division of labor.

The allied corridor also contains centers of control. American export jurisdiction, design software, dollar clearing, cloud platforms, and military command can turn interdependence into permission. Japan and South Korea use industrial policy, subsidies, and export controls. Every major actor now combines markets with state power.

The decisive difference is sovereign closure. China’s sprawling industrial stack ultimately sits beneath one sovereign veto. The corridor’s critical layers remain distributed among governments that cannot command one another. Beijing can order. The corridor has to coordinate.

That difference creates opposing strengths. China can mobilize resources, establish priorities, and absorb duplication within a single authority. The corridor can preserve political variation, prevent one capital from owning the whole stack, and generate competing centers of capability. China gains coherence from command. The corridor gains survival value from vetoes that do not collapse into one.

Those vetoes are also a liability. Japan and South Korea can obstruct one another. Washington can use security pressure to reorganize commercial decisions. Taiwan cannot participate normally in many formal institutions. Southeast Asian states maintain different relationships with China. Domestic elections can reverse industrial policy or weaken alliance commitments. The absence of an emperor prevents domination, but it does not guarantee coordination.

No capital can rule the new sphere. That is its architecture and its central problem.

Distribution Is Not Resilience

The industrial corridor already possesses distributed capability. It does not yet possess distributed survivability.

Three structures are often collapsed into one. Concentration places several capabilities inside one jurisdiction. Distributed specialization places different indispensable functions in different jurisdictions. Distributed redundancy allows more than one jurisdiction to perform the same critical function. Only the third reliably converts geography into resilience.

The present system is dominated by distributed specialization. Taiwan fabricates leading-edge logic. South Korea produces critical memory. Japan supplies equipment and materials. The Netherlands provides advanced lithography. The United States controls major design tools, chip architectures, capital, and cloud demand. This arrangement prevents any one state from owning the entire system. It also means that failure at one irreplaceable layer can propagate through all the others.

Dispersion does not eliminate chokepoints. It can arrange them in sequence.

The political value of the corridor therefore does not come from pretending every country can reproduce every layer. That would be ruinously expensive and technically implausible. It comes from choosing which capabilities require duplication, which require protected inventories, which can be restored through allied surge capacity, and which must remain concentrated because the knowledge environment cannot yet be moved.

Redundancy should be selective. More fabrication in the United States, Japan, and Europe can reduce geographic concentration without dismantling Taiwan’s ecosystem. Additional packaging and memory capacity can limit cascades. Shared inventories of critical chemicals and components can buy time. Cross-certified repair facilities can turn Japanese and Korean yards into a common maritime reserve. Alternative ports, cables, data centers, and energy connections can prevent one territorial disruption from disabling coordination across the region.

The goal is not independence. It is distributed continuity.

That distinction also clarifies the danger of indiscriminate reshoring. If American subsidies move a factory from an ally into the United States without increasing total capacity, the system has changed ownership without gaining redundancy. If subsidies trigger parallel capacity while retaining the allied ecosystem, the corridor becomes harder to break. A fab transferred from Taiwan to Arizona can reduce allied leverage and leave overall resilience unchanged. A fab added in Arizona while Taiwan’s ecosystem remains dense can extend the system.

Industrial policy must be judged by the continuity it creates, not the flags placed above individual facilities.

The Historical Name Cannot Be Made Innocent

The Greater East Asia Co-Prosperity Sphere cannot be separated from occupation, forced labor, extraction, racial hierarchy, puppet governments, and mass violence. The phrase was designed to convert domination into solidarity at the level of language. Its use now is defensible only if the inversion remains explicit.

Imperial Japan recognized that the Western Pacific and maritime Southeast Asia formed a connected strategic space in which industry, shipping, raw materials, naval access, energy, and political control could not be separated. It interpreted that connection through the grammar of empire. Coordination meant command. Interdependence meant subordination. Security meant placing one capital above all others.

The method was part of the idea. Occupation could produce obedience but not trusted coordination. It could extract resources but not create the voluntary synchronization, distributed knowledge, and failure recovery on which complex production depends. The imperial sphere began with sovereignty and attempted to force cooperation underneath it. The system that emerged after 1945 developed in reverse.

Japan became more useful after it stopped trying to rule. Taiwan and South Korea became indispensable by developing capabilities no regional center could fully own. Singapore became powerful by coordinating systems it did not conquer. The alliance architecture endured because no single Asian state could convert its economic position into political mastery.

The historical sphere failed because it placed empire above interdependence. The emerging corridor works because interdependence prevents empire from completing itself.

From Supply-Chain Accident to Continuity System

The sphere does not yet exist as a conscious political order. It exists as overlapping dependence, partial coordination, and a growing recognition that economic security belongs inside alliance strategy. American and Japanese leaders now describe economic-security cooperation as an indispensable part of their alliance, and bilateral and trilateral initiatives increasingly address critical minerals, technology, supply chains, and industrial resilience.[7] The language has moved ahead of the institutions.

A genuine continuity system would require a small number of concrete instruments.

First, the corridor needs standing allocation agreements for critical inputs. Shared inventories are insufficient if governments begin bidding against one another when a shortage arrives. Pre-agreed priorities, emergency release rules, and visibility into stockpiles would limit cascades across fabrication, memory, energy, and transport.

Second, trusted production must remain trusted across jurisdictions. Mutual recognition of industrial-security standards, export-control compliance, cybersecurity requirements, and supplier certification would allow capacity in one allied state to serve the others without a new political negotiation during every crisis.

Third, Japan and South Korea should be treated as parts of a common allied maritime-industrial base. Repair access, cross-certification, workforce exchanges, shared component inventories, and pre-negotiated emergency capacity would connect their commercial depth to American naval endurance. This does not require transferring command of the fleet. It requires recognizing that readiness already depends on an industrial geography wider than the United States.

Fourth, subsidy policy must stop treating allied capacity as foreign capacity. American, Japanese, Korean, Taiwanese, Australian, and European programs can create redundancy or cannibalize one another. Coordination should measure whether incentives add capacity, move it, or destroy a viable ecosystem somewhere else. National announcements count facilities. A continuity strategy counts the system that remains after the subsidies are spent.

Finally, the corridor needs an owner during stress. No single capital can command it, but designated institutions can map dependencies, run disruption exercises, assign restoration responsibilities, and maintain a common picture of the stack. The relevant model is not a supranational government. It is an operating compact among sovereigns that expect to disagree but refuse to discover their interdependence for the first time during a blockade or industrial shock.

These arrangements would produce visible consequences. American strategy would increasingly treat allied production as part of the defense base. Washington would protect indispensable ecosystems while simultaneously attempting to reduce dependence on them. Smaller allies controlling several linked capabilities would gain more influence than states holding one isolated commodity. Reshoring would alter political leverage only when coordination environments moved with factories. Crisis allocation and repair, rather than summit declarations, would reveal whether the corridor had become real.

The sphere will not be created by a treaty announcing its existence. It will appear when protecting the region and preserving the machinery of advanced civilization become the same operational task.

The Sphere That Protects Its Protectors

The twentieth-century map placed power in capitals. Washington protected allies. Tokyo commanded colonies. Beijing sought continental depth. Smaller states appeared as buffers, clients, bases, markets, or territory to be controlled.

The industrial map places power inside systems: fabrication, memory, machinery, energy, logistics, cables, shipyards, data centers, standards, finance, and repair. These systems remain governed by states, but they no longer fit cleanly inside the hierarchy of states. A militarily subordinate ally can become operationally indispensable. A commanding power can retain strategic authority while losing the capacity to execute alone.

East Asia occupies the center of this crossed hierarchy. Its states remain divided. Many remain militarily dependent on the United States. None can secure the regional order alone. Together, however, they hold enough of the industrial machinery that the formal protector increasingly depends on the protected.

The client becomes infrastructure.

Imperial Japan tried to build a sphere in which Asia would preserve Japanese power. It understood regional coherence through conquest, hierarchy, and command. The empire disappeared. A different coherence formed across the same strategic geography: production without political unity, integration without a sovereign center, and dependence running in both directions.

This order remains incomplete. The global machine includes actors the corridor may one day have to operate without. Its most valuable capabilities remain exposed. Its distributed specialization creates sequential chokepoints. Its governments can still turn dependence against one another. The system exists economically before it exists strategically.

That is precisely why its structure matters. The United States still protects the geography in which the East Asian machine operates. The East Asian machine increasingly preserves the operational capacity through which American power operates. The shield and the machine now protect each other.

The old sphere tried to escape the world by subordinating a region. The new corridor matters because the world cannot easily escape it.

America protects the map. East Asia protects the machine.

Notes

[1] On the Co-Prosperity Sphere’s Pan-Asian rhetoric, extractive political economy, occupation systems, and wartime mobilization, see Gregg Huff, World War II and Southeast Asia: Economy and Society under Japanese Occupation (Cambridge University Press, 2020), and the established historical literature distinguishing the sphere’s public language from its governing reality.

[2] Taiwan Semiconductor Manufacturing Company, 2025 Annual Report and 2025 Form 20-F, including the company’s reported process technologies, products, customers, advanced packaging, and manufacturing footprint.

[3] TSMC, 2025 Annual Report, discussion of geographic flexibility and the March 2025 announcement of additional investment in the United States. The distinction between object scarcity and embedded execution is developed in Taiwan Must Build the Synthetic Shield.

[4] U.S. Pacific Fleet, “USNS Wally Schirra Completes Major Maintenance at South Korean Shipyard,” March 13, 2025.

[5] U.S. Ship Repair Facility and Japan Regional Maintenance Center (SRF-JRMC), “USS Miguel Keith Completes ROH at MHI,” April 2025, on the completion of the vessel’s five-month Regular Overhaul at Mitsubishi Heavy Industries, Yokohama, on April 15, 2025, described as the first overhaul contract of its scale awarded to a Japanese commercial shipyard; the restriction did not apply because the availability lasted under six months and the ship was not due to return to the United States within fifteen months.

[6] World Trade Organization, Japan - Measures Related to the Exportation of Products and Technology to Korea, dispute DS590, initiated in 2019.

[7] United States-Japan Joint Leaders’ Statement, February 2025, describing economic-security cooperation as an indispensable part of alliance cooperation; see also subsequent U.S.-Japan and U.S.-Korea arrangements on critical minerals, technology, and resilient supply chains.