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Japan's leader, Sanae Takaichi, committed to respond "with calm determination" following accusations that People's Liberation Army jets acquired a radar lock on Japan's fighter jets south-east of Okinawa's primary island during the weekend.

A Dangerous Aerial Encounter Disclosed

According to Japan's Ministry of Defense, Chinese J-15 fighter aircraft from the carrier Liaoning engaged its fire-control radar on Japan's F-15s twice on Saturday. This occurred took place at 1632 hours and occurred again approximately later. The ministry noted that a visual sighting was not possible due to the distance, adding that no damage or injuries were reported.

"It marked the first time the Japanese defence ministry has disclosed an event of this nature," a report stated. Fighter jets routinely employ radar systems to target identification.

Diplomatic Objection and Counter-Claims

Reacting to Tokyo's claims, China's navy issued a declaration rejecting the report as "totally contrary to reality." The statement demanded Tokyo to "cease making false accusations." Conversely, Beijing claimed that Japanese SDF planes had "posed a grave risk to flight safety" by consistently approaching its training zones. The Chinese statement made no reference to a radar lock-on.

An official for China's Ministry of Foreign Affairs subsequently urged Tokyo to "halt its dangerous moves of harassing our normal military exercise and training."

Escalating Strains and Broader Background

Relations between Beijing and Japan have deteriorated markedly in recent weeks. This cooling came after Prime Minister Takaichi stated that an attack on Taiwan could trigger the deployment of Japanese military should the situation presented an extreme danger to the nation.

Takaichi insisted that Japan could exercise its right to collective defense, meaning coming to the aid of a partner under attack. She emphasized that Japan had to "anticipate the most severe possibilities" regarding the Taiwan Strait.

Japan's defence minister, Shinjiro Koizumi, labeled Saturday's radar incident as "dangerous and extremely regrettable." In a diplomatic move, the Chinese envoy to Japan, Wu Jianghao, was summoned the following day.

A senior vice-foreign minister, Funakoshi Takehiro, lodged a "strong protest" and urged the Chinese government to "ensure that similar actions do not recur."

Enduring Points of Contention

Japan and China are also locked in a protracted territorial dispute over the islands, called the Diaoyu in China. These tiny, unoccupied islands lie between Okinawa and Taiwan.

Furthermore, regional tensions continue. Japan is deepening military and strategic ties with American and other partners in the Indo-Pacific region, a region where several countries have similar territorial and maritime disagreements with China.

Beijing, in turn, maintains vast territorial claims in the South China Sea, a posture that has drawn criticism and legal challenges.