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CrisisWatch is our global conflict tracker, an early warning tool designed to help prevent deadly violence. It keeps decision-makers up-to-date with developments in over 70 conflicts and crises every month, identifying trends and alerting them to risks of escalation and opportunities to advance peace. In addition, CrisisWatch monitors over 50 situations (“standby monitoring”) to offer timely information if developments indicate a drift toward violence or instability. Entries dating back to 2003 provide easily searchable conflict histories.

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Asia

China/Japan

China maintained naval activity in East China Sea as U.S. and Japan held joint exercises in wider region. 

Beijing continued maritime presence. As of 28 Feb, Japan spotted 106 Chinese vessels in Japan’s contiguous zone, while four vessels were detected within Japan’s territorial sea. Japan’s Coast Guard 6 Feb urged the four Chinese vessels to leave its territorial waters, which after almost two hours sailed northward. According to Japanese officials cited by media, Chinese authorities have ships constantly stationed north west of disputed Senkaku/Diaoyu Islands in East China Sea, which Japan claims as its territorial waters. 

Japan and U.S. held joint exercises. U.S. and Japan 1 Feb conducted joint military exercises in Philippine Sea, demonstrating their ability to respond to contingencies across regional waters; exercises involved dozen warships, including two U.S. aircraft carriers. Japanese Self-Defense Forces and U.S. military 2 Feb identified China as hypothetical enemy in their joint command post exercise for first time, reflecting growing concerns over potential future invasion of Taiwan by Beijing. 

Japan sought to deepen maritime cooperation across region. Reports mid-month indicated Japan is drawing up new ten-year plan to improve maritime capabilities of four nations in Southeast Asia that are struggling to resist growing encroachment into their territorial waters by China.

Asia

China/Japan

China maintained naval activity in East China Sea, while Japan strengthened defence posture amid regional threats. 

Beijing continued maritime presence. As of 28 Jan, Japan spotted 105 Chinese vessels in Japan’s contiguous zone, with six vessels detected in Japan’s territorial sea. Japan’s Coast Guard 11 Jan urged four Chinese vessels to leave its territorial waters, which marked first time Chinese coast guard ships entered such waters since 18 Dec. Japanese, South Korean and U.S. navies 16 Jan held three-day trilateral maritime exercise off South Korea’s Jeju Island to bolster regional security. 

Tokyo continued military build-up. Tokyo late Dec approved record increase in defence spending for 2024, accelerating deployment of long-range cruise missiles, amid perceived regional threats. Japan 18 Jan signed deal with U.S. to purchase up to 400 Tomahawk cruise missiles. Japan late Dec revised arms export guidelines to enable Patriot missile systems to be delivered to U.S. for onward transfer to Ukraine, prompting Russia to warn move could have “grave consequences” for bilateral relations.

Asia

China/Japan

China maintained high naval activity in East China Sea and conducted joint aerial operations with Russia, while Beijing and Tokyo continued diplomatic engagement.

Maritime and aerial activity continued around disputed East China Sea islands. As of 31 Dec, Japan spotted 91 Chinese vessels in Japan’s contiguous zone during Dec and eight vessels within Japan’s territorial sea. China’s and Japan’s coast guards 10 Dec accused other of intrusions previous day in territorial waters of Senkaku/Diaoyu Islands; two Chinese Coast Guard ships 9 Dec and 10 Dec, and four ships 18 Dec entered Japan’s territorial waters around Senkaku/Diaoyu. Japanese Coast Guard revealed Chinese vessels made incursions into island’s contiguous zone on 352 days in 2023, highest number since records began in 2008. Meanwhile, Japan’s defence ministry 14 Dec reported two Chinese H6 bombers flew from East China Sea to Sea of Japan, meeting with two Russian TU95 bombers for joint flight, just as around seventeen Chinese and Russian aircraft flew around Japan, prompting Japanese fighter jets to scramble.

Japan and China continued diplomatic engagement. China’s ambassador to Japan Wu Jianghao 6 Dec met with representative of Japan’s Komeito political party Natsuo Yamaguchi to discuss promoting exchanges and communication in various fields, including party exchanges. China’s foreign ministry 8 Dec stated China holds open attitude towards exchanges and cooperation with Japan, including party-to-party exchanges, and expressed hope that Japan will make efforts to build constructive and stable relationship. Japan’s new ambassador to China, Kanasugi Kenji, 19 Dec arrived in China’s capital Beijing, expressing his intention to advance dialogue between two countries and address pending issues, including China’s restrictions on imports of Japanese fishery products over concerns related to release of treated water from Fukushima nuclear power plant.

In other important developments. Japanese, U.S. and Australian militaries 4 Dec initiated their first trilateral command post drill aimed at enhancing their readiness for Japan’s defence. China’s defence ministry 14 Dec urged Japan to stop interfering in China’s internal affairs and spreading false narratives about “Chinese military threat” as excuse for its military expansion.

Asia

China/Japan

China and Japan continued maritime presence around disputed Senkaku/Diaoyu Islands in East China Sea, while their leaders held first direct talks in year.

China and Japan continued maritime presence around contested islands. As of 28 Nov, Japan spotted 98 Chinese navy vessels in Japan’s contiguous zone and twenty vessels in its territorial sea. Chinese Coast Guard 1 Nov reported that three Japanese vessels and several patrol boats “illegally” entered “territorial waters” near disputed Senkaku/Diaoyu Islands. Chinese Coast Guard ships 1-5 Nov entered Japanese waters around Senkaku/Diaoyu Islands and four such vessels 9 Nov entered Japan’s territorial waters off islands, which prompted Tokyo to lodge protest with Beijing. Chinese Coast Guard 28 Nov reported that it warned off Japanese ships in waters surrounding islands.

China and Japan held high-level dialogue. Marking their first direct talks since Nov 2022, Chinese President Xi and Japanese PM Fumio Kishida 16 Nov met in U.S. city San Francisco on sidelines of APEC summit. Kishida expressed serious concerns about China’s frequent military activities near Japan, including cooperation with Russia, and reiterated importance of peace and stability in Taiwan Strait. Kishida also strongly urged China to remove buoy set up in Japan’s Exclusive Economic Zone in East China Sea. Chinese FM Wang Yi 9 Nov met sec gen of Japan’s National Security Secretariat Takeo Akiba ahead of Xi-Kishida meeting; Wang urged counterpart to translate intention to improve ties into concrete action. FMs of China, Japan and South Korea 24 Nov held trilateral meeting first time in four years.

Japan courted closer defence ties with partners. Kishida 11 Nov stated that with increasing military activities of China and Russia, Japan is in most severe and complex security environment since World War II. Japan and Philippines 4 Nov announced negotiations on deal to deploy troops on each other’s territory. Japan and UK 7 Nov reaffirmed their comment to strengthen security cooperation. During visit to Australia, VP of Japan’s ruling Liberal Democratic Party 13 Nov urged Japan, U.S. and Australia to unite against any forceful change to status quo; Aso proposed inclusion of Japan in AUKUS framework, suggesting “JAUKUS” alliance.

Asia

China/Japan

China’s maritime presence in waters around Japan remained source of tension, Canada and Beijing blamed each other for aerial incident, and U.S. spotlighted China’s “risky” military encounters.

Japan protested China’s regional maritime presence. As of 29 Oct, Japan spotted 100 Chinese vessels in Japan’s contiguous zone, while it detected eight vessels within Japan’s territorial sea over three days. Japanese Coast Guard 16 Oct said two Chinese ships entered Japan’s territorial waters off disputed Senkaku/Diaoyu Islands, south of Minamikojima Island; Japanese Coast Guard warned Chinese vessels to leave waters. Chinese and Japanese coast guards 17 Oct confirmed that their ships faced off in waters around islands. Tokyo next day lodged protest with Beijing after Chinese research vessel “Xiangyanghong 18” was suspected of conducting unauthorised marine survey about 129km north east of Japan-controlled Taisho Island. Two Russian Tu-95 bombers accompanied by two fighter aircraft 17 Oct flew over Sea of Japan, prompting Japan to scramble its fighter jets.

Canada and China traded barbs over mid-air incident. Canada 16 Oct claimed that Chinese military plane intercepted its aircraft in “aggressive manner” in international airspace off Chinese coast; China claimed that Canadian plane was flying over Senkaku/Diaoyu Islands, which violated China’s sovereignty and compelled China to take necessary measures.

U.S. highlighted trend of increasing Chinese coercive action in air. U.S. Defense Department 17 Oct released collection of declassified images and videos depicting fifteen recent cases of “coercive and risky operational behavior” by China’s military against U.S. aircraft in East and South China Sea regions; U.S. claimed that it has recorded more than 180 such incidents since Autumn 2021. Japan’s Maritime Self-Defence Force 9-10 Oct held joint exercise with U.S. and South Korean navies in East China Sea. Japan and Australia 19 Oct agreed to include Australian troops in large-scale joint command post drills with U.S. for first time.

Asia

China/Japan

China continued its maritime presence in waters surrounding Japan, while Tokyo rejected Beijing’s claim over disputed islands and voiced concern over its military build-up.

China continued regional maritime presence. As of 28 Sept, Japan spotted 92 Chinese vessels in Japan’s contiguous zone during month and detected eight vessels within Japan’s territorial sea. China 11-15 Sept conducted five-day military exercise in West Pacific during which its Shandong carrier strike group was spotted entering waters southeast of Taiwan and Bashi Channel, while eight additional Chinese navy warships passed through Miyako straits in East China Sea; during drill, Shandong launched around 40 fighter jet missions and 20 helicopter sorties.

Japan rejected China’s claim over disputed islands. Japan 5 Sept protested new standard map published by China in late Aug, which depicted disputed Senkaku islands – known as Diaoyu islands to China – as part of China’s territory. Japan 20 Sept asked China to remove buoy found by Japan’s Coast Guard near Senkaku/Diaoyu islands believed to be collecting data related to weather and sea conditions.

Tokyo acknowledged strained ties and China’s military development. After Japanese PM Fumio Kishida 13 Sept reshuffled cabinet, newly-appointed FM Yoko Kamikawa next day asserted it is important for Japan to maintain frank dialogue with China to improve strained ties, while newly-appointed Defence Minister Minoru Kihara 17 Sept expressed concern over China’s rapid military build-up in East China Sea and South China Sea; Kihara also said Tokyo and U.S. will step up joint exercises as pair 14 Sept began Orient Shield 23 drills in Hokkaido prefecture.

Asia

China/Japan

In East China Sea, China continued its maritime presence and conducted operations with Russia.

As of 25 Aug, Japan had spotted 95 Chinese vessels in its contiguous zone during month. It detected 16 such ships in its territorial sea over three days in Aug. Notably, China’s Maritime Security Administration 9 and 12-14 Aug held military exercises in waters adjacent to Chinese city Ningbo. Joint China-Russia flotilla consisting of around 10 ships 17 Aug operated in East China Sea, after it had sailed near Alaska earlier in Aug; China’s foreign ministry said passage was consistent with international law. Japan next day spotted two Russian IL-38 information-gathering aircraft flying between Sea of Japan and East China Sea, prompting Japan to scramble its fighter jets. Japan 25 Aug sent fighter jets to monitor two Chinese air force bombers flying between Okinawa and Miyako islands.

Asia

China/Japan

China maintained maritime presence in East China Sea and conducted drills with Russia, as Japan and NATO deepened ties.

Military activity continued in East China Sea. As of 25 July, Japan had spotted 98 Chinese vessels in its contiguous zone over course of month, detecting six vessels in its territorial sea over just two days. Chinese flotilla comprising five warships 16 July set off to join Russian naval and air forces in drill in Sea of Japan aimed at “safeguarding the security of strategic waterways”, according to China’s defence ministry; China and Russia 23 July completed joint naval drill Northern/Interaction 2023 in Sea of Japan. Following four-year hiatus due to coronavirus pandemic, exchange program between Japanese and Chinese military personnel 16 July resumed. At NATO summit in Lithuania on 12 July, NATO and Japan announced new partnership program intending to advance cooperation in areas such as cyber-security and to increase NATO’s engagement in Indo-Pacific region. Chinese embassy in Japan 24 July said NATO’s plan to expand into region violates UN rules and urged Tokyo to avoid actions that jeopardise trust.

China protested Japan’s activities at nuclear plant. China announced its opposition to Japan releasing treated water from its Fukushima nuclear plant as both China and Hong Kong placed restrictions on seafood imports from Japan; Japan has cited International Atomic Energy Agency assessment that its activities are consistent with international safety standards and that treated water will have negligible radiological impact on people and environment.

Asia

China/Japan

China maintained maritime presence in East China Sea as Japan conducted military exercises with partners and allies.

Military activity intensified in East China Sea. As of 26 June, Japan had spotted 92 Chinese vessels in Japan’s contiguous zone and detected eight vessels within Japan’s territorial sea. Japan, U.S., Australia and Canada 3 June held three-day joint exercise for first time in East China Sea, which involved five vessels, including Japanese destroyer JS Shiranui. China and Russia 6 June conducted joint aerial patrol over Sea of Japan and East China Sea, marking sixth such joint patrol this year; aircraft reportedly entered South Korea’s air defence identification zone, prompting Japan and South Korea to scramble fighter jets in response. Japan’s military and coast guard 22 June rehearsed joint response to armed attack for first time, in line with new guidelines for cooperation. China 13 June held military exercises in East China Sea.

Chinese President Xi referenced southern Japanese islands. During visit to China National Archives of Publications and Culture, Chinese President Xi 4 June made rare mention of China’s historical connection to Japan’s Ryukyu Islands (located close to Taiwan), which observers suggested could be intended as subtle warning to Japan to roll back its increasingly forward position on Taiwan Strait issue (see Taiwan Strait).

Asia

China/Japan

Amid Chinese maritime presence in East China Sea, Japan lodged protests and resorted to new hotline; G7 expressed concern over region, while Tokyo strengthened defence ties to Europe.

Japan protested and used military hotline amid China’s maritime activity. As of 28 May, Japan spotted 98 Chinese vessels in its contiguous zone and 12 ships inside its territorial sea. Notably, Japan 11 May lodged diplomatic protests with Beijing over Chinese intrusions around Japan-controlled and disputed Senkaku/Diaoyu islands in East China Sea, as two Chinese coast guard ships passed within 12-mile limit and remained in waters for some 35 hours in 13th such incident in 2023; Chinese navy flotilla same day sailed through Miyako Strait and waters between Japan’s Okinawa Islands. Japan 16 May for first time used military hotline established with China in March to discuss East China Sea. Tokyo 8 May announced that Japanese forces will deploy surface-to-air guided PAC-3 missiles at its base on Miyako Island in Okinawa Prefecture, citing North Korean ballistic missile threats (see Korean Peninsula); given proximity to Taiwan, however, observers questioned if deployment is also aimed at countering threat of China’s missiles.

G7 voiced concerns over East China Sea, Japan courted ties with NATO and UK. During G7 summit in Japan, leaders in joint communique 20 May said they “remain seriously concerned about the situation in the East and South China Seas” and “strongly oppose any unilateral attempts to change the status quo by force or coercion.” After reports early month revealed NATO intended to open liaison office in Japan and pair will upgrade cooperation ahead of NATO summit in July, China 4 May said alliance’s “eastward foray” will “inevitably undermine regional peace and stability”. UK and Japan 18 May signed “Hiroshima Accord”, described as “enhanced global strategic partnership” aimed at strengthening cooperation in broad range of areas, including defence.

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