BREAKDOWN: Japan Weaves Its Network of Navies Against China — The Pacific's Other Front

Introduction: Tokyo Becomes a Regional Military Power Again

The Silent Transformation

Something profoundly significant is happening in the waters of the Indo-Pacific, and most eyes are looking elsewhere. While the world watches Ukraine, the Strait of Hormuz, and American polling numbers, Japan is executing the largest military transformation in its history since 1945. Without fanfare, without thunderous declarations, Tokyo is building what experts now call a "network of navies" — a set of defense partnerships, arms transfers, and joint military exercises aimed at encircling China along the first island chain.

The question posed during a recent Taiwan Talks broadcast recorded on June 17, 2026 perfectly summarizes the strategic challenge: "Is Japan building a new network of navies to counterbalance China's growing influence?" The answer, judging by the accumulated facts of recent years, is an increasingly categorical yes. Tokyo exports destroyers to Australia, offers frigates to the Philippines and Indonesia, conducts military exercises with seven nations, and deploys long-range missiles on its southwestern islands.

The First Island Chain: A Maritime Wall

To understand Japan's strategy, one must visualize the geography. The first island chain extends from Japan in the north to the Philippines in the south, passing through the Ryukyu Islands, Taiwan, and the disputed islands of the East and South China Seas. This chain constitutes the primary barrier between China's coastline and the open Pacific. Each passage between these islands — the Luzon Strait, the Miyako Strait, the Bashi Channel — is a potential chokepoint for the Chinese navy.

Japan controls the northern half of this chain. More than 100 Ryukyu Islands extend from the Japanese mainland down to Yonaguni, which sits just 110 kilometers from Taiwan's coast. These islands are no longer beach resorts and diving spots — they are becoming military outposts loaded with anti-ship missiles, radar systems, and amphibious special forces units.

The Network of Navies: What Exactly Is It?

The Naval Equipment Transfers That Change Everything

The most concrete element of Japan's "network of navies" is the naval equipment transfer policy Tokyo inaugurated in recent years. Japanese law traditionally banned all arms exports. This prohibition was progressively lifted since 2014, and Japan is now beginning to use this opening strategically. In 2026, Tokyo and Jakarta — Indonesia — are in discussions for the transfer of Asagiri-class destroyers to the Indonesian navy. This transfer would provide Indonesia with improved fleet air defense capabilities and ship-based helicopters for anti-submarine warfare.

This is not an isolated case. Australia is receiving Moami-class vessels under a commercial agreement. The Philippines have received Abukuma-class ships. These transfers are not merely commercial — they are political. Alexander Huang, president of the Council on Strategic and Wargaming Studies, summarized the strategy during the Taiwan Talks broadcast of June 17: Japan is "building a network of navies along the first island chain, including Indonesia, and seeking to integrate everyone into air and missile defense." The idea is to "lock in" these partners into long-term logistical, technological, and personnel training collaboration.

The Japanese Amphibious Brigade: The Far East's "Marines"

At the core of Japan's ground military apparatus is the Amphibious Rapid Deployment Brigade (ARDB), established in 2018 and dubbed by the media the "Japanese Marines." This unit of approximately 2,100 personnel, based in Sasebo in Nagasaki Prefecture, is Japan's sole amphibious unit — its first since World War II. Its primary mission: defend Japan's remote islands in the event of invasion, recapture them if necessary. In March 2026, Japan reorganized its major naval units to include the Amphibious Mine Warfare Group, integrating into a unified operational chain sea control, mine countermeasures, and amphibious projection capability.

The Iron Fist exercise of February-March 2026, conducted jointly with U.S. Marines at 19 sites in Japan — three more than the previous year — demonstrated the brigade's operational build-up. Major General Toshikatsu Musha, commander of the ARDB, declared at the opening ceremony that Japan faces "the most severe security environment since the end of World War II." These words, from the mouth of a Japanese officer, are not rhetorical hyperbole. They reflect a serious strategic assessment.

The Concrete Chinese Threat: Evidence in Indonesian Waters

The Torpedo in the Lombok Strait

The Chinese threat is not theoretical. It materializes in specific, documented incidents that attest to Beijing's strategy in the region. In April 2026, an Indonesian fisherman discovered a torpedo-like device in the Lombok Strait, near Bali. The device measured nearly four meters in length. On its surface was inscribed the name of the China Shipbuilding Industry Corporation. An Indonesian spokesperson declared that the armed forces would "protect the sovereignty of territorial waters against unauthorized activities, including the use of underwater devices or equipment." The wording is careful. The message is clear.

This is not an isolated event. China conducts repeated incursions into Indonesia's exclusive economic zone, recorded by maritime monitoring organizations such as Sealite. A year ago, Indonesia claimed to have expelled Chinese vessels from its waters near the Natuna Islands — Beijing denied it. China's nine-dash line, that absurd tracing based on 1930s maps, cuts directly through the Indonesian exclusive economic zone. Indonesia, like the Philippines, Taiwan, Vietnam, and many others, lives under the daily pressure of this Chinese maritime expansion.

The Submarine War: The Real Stakes

According to Bill Hayton, associate fellow in the Asia-Pacific program at Chatham House, "the battle is largely underground." China seeks to use the South China Sea to hide its ballistic nuclear submarines — its primary strategic nuclear deterrent at sea. The United States and Japan are extremely concerned about this ambition. There is a secret submarine battle over control of the South China Sea depths, between submarines and surveillance systems. The Japanese destroyers equipped with anti-submarine helicopters that Tokyo will transfer to Indonesia are directly part of this equation.

The strategic straits threading through the Indonesian archipelago — the Lombok Strait, the Malacca Strait, the Sunda Strait, the Wetar Strait — are the passage gates between the Pacific and the Indian Ocean. In a crisis, whoever controls these passages controls maritime access to much of Asia. China is investing in knowledge of these zones, as the Lombok torpedo reveals, because it wants to secure alternative routes if the Malacca Strait were to be blocked in the event of conflict.

Balikatan 2026: A Historic Milestone

Japan Fires Missiles in the Philippines — A Taboo Broken

On May 6, 2026, during the joint military exercises Balikatan 2026 in northern Philippines, Japan accomplished something historic: it fired Type 88 anti-ship cruise missiles from Philippine soil, sinking a target vessel 75 kilometers offshore. This was the first time Japan used offensive capabilities outside its own borders since World War II — an 80-year taboo broken in a single day of exercises.

With the participation of 17,000 soldiers from seven nations — Philippines, United States, Japan, Australia, Canada, France, New Zealand — and the integration of Japanese systems with American HIMARS and Philippine naval assets, Balikatan 2026 transformed the first island chain into an operational missile shield. Japanese Type 88 missiles fired from northern Philippines, combined with NIS missiles from the Batanes Islands to the east, create a "missile arc" that considerably restricts Chinese naval maneuver toward the east. Japan's contribution with 1,400 soldiers was the third largest in the exercise, after the Philippines and the United States.

The Strategic Logic of the "Missile Wall"

Japan's strategy rests on an anti-access / area denial (A2/AD) logic — the same type of strategy China uses to bar American naval access to its coastal waters. By deploying long-range missiles along the island chain from Kyushu to Yonaguni, equipping Indonesia and the Philippines with enhanced naval capabilities, and integrating all of this into a shared command and control system with the United States, Japan is creating a barrier that makes any Chinese amphibious or naval operation against Taiwan or the Senkaku Islands extremely costly.

In March 2026, Japan deployed its first long-range Type 12 surface-to-surface missiles on Kyushu — with a range exceeding 1,000 kilometers, they can reach targets in the East China Sea all the way to China's coastline. Even more advanced variants, with a range of 2,000 kilometers, are planned for the Ryukyu Islands, notably Okinawa. If deployed, virtually the entire eastern Chinese coast would be within Japanese strike range.

The 2026 Defense White Paper: China Named Explicitly

A Strategic Document Without Equivocation

Japan's 2026 Defense White Paper was expected to name China again as Tokyo's primary security concern. This is no longer a polite formula around a "complex regional situation" — it is an explicit designation of the threat. According to analysts from Alexander Huang's Council on Strategic and Wargaming Studies, the white paper reflects a major evolution: Japan now considers itself to be at the front line of geopolitical competition with Beijing, and is adapting its military doctrine accordingly.

The white paper details Chinese military activities in waters surrounding Japan. The Chinese Coast Guard patrolled 357 days in 2025 in the waters of the Japanese-administered Senkaku Islands. PLA Navy carrier groups transited for the first time through waters northeast of Iwo Jima, a strategic island that serves as a forward base for Japan's Self-Defense Forces. A Chinese carrier strike group has been operating in waters east of the Philippines since May 19, 2026. These are not routine exercises. They are calculated demonstrations of power.

Japan's Response: "Not Standing Still"

Facing China's military expansion, Japanese doctrine has shifted from exclusive defense toward "counterstrike capabilities" — the legal ability to strike enemy weapons systems before they fire on Japan. This is a doctrinal revolution for a country whose Constitution limits armed forces to strict self-defense. The Prime Minister presented this evolution as a pragmatic necessity, not bellicosity.

In waters east of Taiwan, China deployed the research vessel Xiang Yang Hong 22 between June 16 and 18, 2026, escorted by two Chinese Coast Guard ships. This "marine environmental survey" operation is in reality an attempt to normalize Chinese presence in strategic waters near the Bashi Channel, the Miyako Strait, and other crucial chokepoints that China will seek to control during a potential blockade or invasion of Taiwan. China uses "environmental conservation" as a pretext — the same pretext used around the Philippines' Scarborough Shoal.

The Japan-Philippines Reciprocal Access Agreement: A Historic Alliance

The First RAA With an Asian Country

The Reciprocal Access Agreement (RAA) signed between Japan and the Philippines represents an unprecedented diplomatic and military milestone. It is the first such agreement Japan has signed with another Asian country — a country Tokyo invaded and occupied during World War II. Having entered into force in September 2025, this treaty creates the legal basis for Japanese and Philippine forces to operate on each other's territory and station troops and equipment. Combined with the Acquisition and Cross-Servicing Agreement (ACSA), it transforms this presence into real operational depth.

During Balikatan 2026, Colonel Sho Tomino of the JGSDF's Amphibious Rapid Deployment Brigade illustrated the spirit of this new alliance: "I believe we have fortified our 'shoulder to shoulder' bond." These words, from the mouth of a Japanese officer speaking to the Philippines, carry a complex history and a courageous pragmatism. The common threat — China — has accomplished what decades of diplomacy had failed to achieve: reconciling in an operational military alliance two nations that fought each other.

Taiwan, Silent Observer

There is a revealing detail in Balikatan 2026: Taiwan sent discreet military observers. Officially, no one speaks of it. Diplomatically, this presence is explosive — it implies that the island Beijing considers a renegade province was indirectly participating in military exercises explicitly aimed at countering a Chinese invasion. Taiwan is increasing its own defense budget: 561.4 billion new Taiwan dollars (approximately 17.8 billion U.S. dollars) in its 2026 general budget, a rise of approximately 20 percent compared to 2025. President Lai Ching-te seeks to bring defense spending to 3.3 percent of GDP, up from 2.4 percent currently.

Taiwan's challenge comes from within, however: opposition parties have significantly delayed adoption of the 2026 general budget, which could have adverse effects on the island's military readiness. The Kuomintang and the Taiwan People's Party blocked efforts to increase funding for the domestic drone industry. In a country that depends on unconventional weapons capabilities to offset its numerical inferiority against China, this is a concerning strategic weakness.

Beijing's Response: Accusations and Cognitive Warfare

The Accusation of "Neo-Militarism"

Beijing has not remained silent in the face of Japan's military transformation. The Chinese response combines historical accusations and a cognitive warfare campaign designed to delegitimize the expansion of Tokyo's alliances in Southeast Asia. The Global Times and Chinese state media have accused Japan of "neo-militarism," invoking Japanese war crimes from World War II in an attempt to dissuade Southeast Asian nations from cooperating with Tokyo.

This strategy, according to Bill Hayton of Chatham House, is an attempt at cognitive legitimation — using history to "delegitimize everything Japan does now by referring to war crimes." Hayton believes this approach has little chance of convincing anyone in Southeast Asia, where countries like Indonesia, the Philippines, or Vietnam see China as a direct threat and Japan as a potential partner. China's strategy seems designed to "try to frighten Southeast Asian countries that their cooperation with Japan might incite Beijing's anger."

The Real Signals of Beijing's Concern

Analysis of China's reaction reveals something significant: China considers Japan to be the country doing the most to strengthen resistance to its regional expansion. This is not a neutral critique — it is recognition of the effectiveness of Japan's strategy. Beijing sees Japan "stepping up while the United States thinks about what it will do in coming years." While Trump's America hesitates on its Indo-Pacific commitment, Japan fills the void.

The March 2026 reform of Japan's major Self-Defense Force units — creation of the Fleet Surface Force including minesweepers and transport vessels, with a new Amphibious Mine Warfare Group at Sasebo — was described by the Global Times as "a pretext targeting China." Chinese expert Xiang Haoyu saw in this reform an attempt to "create an integrated sea-coast-island defensive network" and to "block the Chinese navy's access to the Pacific." That is exactly the intention. And Beijing cannot ignore it.

Australia's Role: An Essential Link in the Network

The U.S.-Japan-Australia Trilateral Alliance

Australia is an indispensable link in Japan's maritime network. The U.S.-Japan-Australia trilateral alliance constitutes the backbone of collective security in the western Pacific. Australia has faced Chinese maritime pressure for several years — incursions in the South China Sea, trade tensions imposed by Beijing in retaliation for Australian political decisions. Japan's commercial-framework sale of Moami-class vessels to Australia represents a concrete expansion of this alliance.

The Japan News cites Pacific island defense as a growing priority for Tokyo. In 2026, the Japan-Pacific Islands Defense Dialogue was held for the third time, with Defense Minister Shinjiro Koizumi pledging to strengthen relations with 14 Pacific island nations. Facing Chinese efforts to extend its influence in these nations — China signed a security agreement with the Solomon Islands in 2022, allowing deployment of Chinese military and police forces — Japan is seeking to counter this diplomatic encroachment by offering personnel exchanges and a multilateral cooperation framework.

AUKUS and the Question of Japan's Role

The AUKUS pact — between Australia, the United Kingdom, and the United States, notably providing Australia with nuclear-powered submarines — is technically distinct from Japan's network. But the two architectures complement each other. Australia, equipped with AUKUS submarines and Japanese destroyers, will command unprecedented maritime projection capability in the South Pacific. The question of whether and how Japan might integrate into AUKUS is an ongoing strategic debate — some analysts speak of an "AUKUS Plus," and Tokyo is not hostile to the idea.

Bill Hayton put it simply: the future of Indo-Pacific security rests on "a coalition of friendly partners and allies learning to work together through arms transfers, diplomacy, personnel training, and exercises." That is precisely what Japan is building, piece by piece, island by island, destroyer by destroyer.

Japan's Capability Gap: What Is Still Missing

Gaps to Bridge by 2030

Despite Japan's impressive military build-up, significant capability gaps remain. Japan's full archipelago strike capability will not be operational and fully integrated with American forces until around 2030. Deliveries of JASSM-ER — American long-range air-to-ground cruise missiles — are scheduled for 2027. The integrated command structure is functional but still under development. Long-endurance surveillance drones, high-seas early warning capabilities, advanced undersea warfare systems — all of this is being acquired but not yet deployed at full scale.

There is also the question of munitions depth. In high-intensity warfare, missile stocks are depleted rapidly — the Ukrainian experience is the most recent demonstration. Japan has purchased 400 Tomahawk missiles to equip eight of its Aegis destroyers. Live-fire tests are scheduled for the summer of 2026. But the question of logistical sustainability in a prolonged conflict remains a colossal challenge for armed forces structured for defense since 1945.

Counterintelligence: The Taiwanese Vulnerability

The security of the Indo-Pacific network suffers from a glaring vulnerability: espionage. In Taiwan, the Control Yuan recently indicted former Air Force Academy Colonel Chang Ming-che, sentenced to 11 years in prison for transmitting sensitive information to a Chinese espionage network. He had accepted approximately 42,000 U.S. dollars in payments from a Chinese spy between September 2019 and November 2024. Information transmitted included briefings on Taiwanese air exercises, details on Taiwan-U.S. cooperation missions, and military personnel information.

This case is not isolated. It illustrates the human intelligence dimension of Sino-Taiwanese competition — and by extension, Sino-Japanese competition. Japan itself has faced several espionage cases involving Chinese nationals. Building a robust military network requires an equally robust counterintelligence culture. This may be the least visible but one of the most critical dimensions of strategic competition in the Indo-Pacific.

The American Imperative: Can Washington Disengage From the Pacific?

The Pacific Cannot Afford a European Pivot

The great question hanging over Japan's military network is American commitment. Washington can demand that Europe take charge of its own defense. But can it disengage from the Indo-Pacific in the same way? The answer is no — and for good reasons. China, unlike Russia, represents a global economic, technological, and military challenge, not merely a regional one. A China dominating Pacific maritime routes, controlling global technology supply chains, imposing its international order would be an existential threat to the Western way of life.

Japan's strategy therefore rests on a fundamental assumption: the United States will remain sufficiently engaged in the Pacific to constitute the backbone of deterrence, even if their financial contribution and troop deployments are rebalanced. Japan's network of navies is not designed to replace the United States — it aims to increase the cost of Chinese aggression sufficiently that deterrence remains credible even if American support is less certain than before.

The Race Against the Clock Facing China's Timeline

Retired Taiwanese General Chiu Kuo-cheng had warned that China could have the capability to invade Taiwan by 2027. Other experts push back that date, but all agree that the strategic window is narrowing. Japan and its partners must complete their defensive network — missiles deployed, operational alliances, integrated systems — before China judges that the moment to act has arrived. This is a race against the clock measured in years, not decades.

Every destroyer transferred to Indonesia, every joint exercise with the Philippines, every anti-ship missile deployed on Ishigaki — all of it counts. The wall is not yet complete. But it is being built. And its principal architect is Tokyo.

Undersea Espionage and the Invisible Battle for the Depths

The Depths as a New Front

The battle for control of the South China Sea's marine depths is a warfare front the general public does not see. China seeks to use the deep waters of this sea as a sanctuary for its Jin-class ballistic nuclear submarines — the naval equivalent of its land-based intercontinental missiles. Once hidden in the depths, these submarines constitute a credible second-strike capability in the event of nuclear conflict. The United States and Japan are extremely concerned about this ambition. There is a secret undersea battle for control of South China Sea depths, between submarines and surveillance systems. The Japanese destroyers equipped with anti-submarine helicopters that Tokyo will transfer to Indonesia are directly part of this equation.

It is in this context that the anti-submarine capability of the Japanese destroyers being transferred to Indonesia takes on its full importance. Indonesia, guardian of the strategic straits between the Pacific and the Indian Ocean, would share undersea surveillance data with Tokyo and Washington. This sharing of sensitive intelligence — explicitly mentioned within the Japan-Indonesia partnership framework — is one of the most delicate and most important dimensions of defense cooperation.

Undersea Drones: The New Frontier

The presence of a torpedo-like device bearing the China Shipbuilding Industry Corporation's marking in Indonesian waters reveals another dimension of naval competition: autonomous undersea drones. These devices, used for seabed mapping, submarine cable surveillance, hydrographic intelligence, or communications disruption, represent the next frontier of undersea warfare. China is investing massively in this technology. Japan and its partners must do the same, and above all develop the means to detect and counter these devices.

The undersea battle is a shadow war, but its stakes sit at the top of strategic priorities. Whoever controls the depths of the South China Sea controls, in the event of conflict, a master piece of the nuclear chessboard. This is one of the reasons Japan is investing in anti-submarine capability for its own forces and for its regional partners.

Indonesia's Choice: From Neutrality to Pragmatic Alignment

Jakarta Between Two Giants

Indonesia has long sought to maintain strategic neutrality between major powers, formally refusing to align with Washington or Beijing. This policy of "free and active foreign policy" is a deep tradition of Indonesian diplomacy. But growing Chinese pressure in its exclusive economic zone — coast guard incursions, the nine-dash line encroaching on Indonesian waters, unidentified underwater devices — is progressively pushing Jakarta toward a security pragmatism closer to the liberal democracies.

Indonesia does not want to be dependent on a single country — it buys French fighter jets, American military equipment, Russian and Chinese weapons. But it has signed a major defense cooperation partnership with the United States and is now discussing the transfer of Japanese destroyers. A controversial letter of intent could even grant the United States overflight or military access to Indonesian airspace. Jakarta is not formally aligning. But Jakarta is moving.

Japan's Soft Seduction Strategy

What is remarkable about Japan's strategy toward Southeast Asia is its effectiveness without arrogance. Tokyo does not ask regional countries to choose between the United States and China. It offers military capabilities, training, intelligence sharing — and lets countries decide for themselves that cooperation with Japan serves their interests. This approach contrasts sharply with China's policy of economic and military intimidation in the region, and with Trump-era American transactionalism.

Japan's objective, as described by Alexander Huang's analysts, is to "strengthen the autonomy of Southeast Asian countries so they have the necessary support to defend their rights in their disputes with China." This is not naive generosity — it is a strategy of well-understood self-interest. An Indonesian archipelago capable of monitoring its waters and defending its strategic chokepoints is a partner of inestimable value for the Indo-Pacific security network.

The Battle for Public Opinion: Winning Hearts Before Battles

Information as Japan's Strategic Weapon

The network of navies Japan is building is not limited to destroyers, missiles, and joint exercises. There is an equally crucial and often overlooked dimension: the information and perception war. China is a master at using its state media — CGTN, Global Times, Xinhua — to hammer the point that Japan is a revanchist militarist whose neighbors should be wary of. This narrative is carefully constructed to sow discord between Tokyo and Seoul, between Japan and ASEAN, and between Japan and its own public opinion.

The Japanese government has responded by increasing strategic communications spending and reinforcing human exchanges with its partners along the first island chain. Academic programs, military exchanges, cooperation in natural disaster relief — all of this builds an architecture of trust whose strategic dividends are invisible but real. South Korea remains a difficult case, but the Philippines, Australia, and Indonesia increasingly see Japan as a reliable partner, not a threat.

Internal Legitimacy: A Challenge for Tokyo

Inside Japan, the military transformation faces deep resistance. Article 9 of Japan's Constitution — which renounces war as a means of settling disputes — remains deeply rooted in the Japanese collective consciousness. Polls show that 55 percent of Japanese approve of strengthening defense capabilities, but a majority still oppose any offensive military engagement beyond Japanese soil. This tension between strategic imperative and constitutional legacy is the true domestic challenge of Tokyo's defense policy.

Prime Minister Kishida, and his successors after him, have chosen to navigate this tension in small steps — each decision presented as a reactive necessity, never as a proactive rearmament choice. "Counterstrike capabilities" are not attack capabilities, Tokyo insists, but advanced defensive deterrence capabilities. This careful semantics is not mere rhetoric: it reflects a deliberate policy line that allows Tokyo to do what is strategically necessary while preserving domestic social peace.

Conclusion: The Pacific Prepares, the Hour of Choices Approaches

The Network Takes Shape

In June 2026, Japan's "network of navies" is no longer an ambition — it is a reality under accelerating construction. Destroyers in the ports of Perth and Manila, missiles on Kyushu and in the Ryukyus, exercises with 17,000 soldiers from seven nations, intelligence partnerships with Jakarta and Manila, an amphibious brigade training to retake islands. Each piece fits together. The maritime wall is taking shape.

What This Network Means for Global Freedom

This network is not directed against the Chinese people. It is directed against the territorial expansion strategy of a regime that does not recognize the sovereign rights of its neighbors, that uses military gray zones to nibble away at the maritime space of free nations, that seeks to replace an international order based on law with a Sino-centric order based on force. Freedom of navigation in the East and South China Seas is not a stake for regional nations alone — it is a stake for global commerce, for the security of liberal democracies, for the international order that allows our world to function. Japan is building the defense of this order. And that deserves our attention, our support, and our respect.

Primary Sources

Taiwan Talks EP858 — Japan Is Building a 'Network of Navies' Against Shared China Threat — June 17, 2026

Institute for the Study of War — China & Taiwan Update, June 18, 2026 — June 18, 2026

Stars and Stripes — Japan's SDF reorganizes major units, Iron Fist island defense exercise — March 2, 2026

Secondary Sources

The Wire China — The Island-Chain Allies, Balikatan 2026 — May 10, 2026

Japan News — Japan Seeks to Counter China by Strengthening Ties with Pacific Island Nations — February 25, 2026

Global Times — Japan's SDF reorganizes its major units — March 23, 2026

Japan Forward — How Japan's Southwest Shift Is Building an 'Island Shield' — April 6, 2026

Heritage Foundation — Japan's Pacific Defense Push — March 23, 2026