The Japanese PM Pledges a 'Firm' Response In the Wake of Radar Lock-On Event With China's Aircraft.

The Japanese prime minister, Sanae Takaichi, vowed to act "calmly and resolutely" following reports that Chinese military jets locked their radar onto Japan's fighter jets southeast of the main island during the weekend.

An Dangerous Incident Reported

Per Japan's Ministry of Defense, China's J-15 jets operating from the aircraft carrier Liaoning activated its fire-control radar against Japanese F-15s on two occasions last Saturday. This occurred took place at 1632 hours and occurred again approximately two hours. The ministry noted that visual confirmation was not possible due to the distance, and confirmed that there was no damage or injuries were reported.

"It marked the first time Japan's defence ministry has disclosed an event of this nature," a report stated. Military aircraft routinely use radar to target identification.

Diplomatic Protest and Denials

In response to Tokyo's claims, China's military issued a statement rejecting the report as "completely inconsistent with the facts." It demanded Japan to "cease slandering and smearing." Conversely, Beijing asserted that Japan's SDF aircraft had "seriously endangered aviation safety" by consistently flying near China's exercise areas. Beijing did not mention a radar lock-on.

An official for the Chinese Ministry of Foreign Affairs subsequently urged Japan to "immediately stop its provocative actions of harassing our routine drills and exercises."

Escalating Strains and Broader Context

Ties linking China and Japan have deteriorated markedly in recent weeks. This cooling followed Prime Minister Takaichi remarked that hostilities against Taiwan could trigger the dispatch of Japan's military if the situation presented an extreme danger to Japan.

Takaichi argued that Japan could invoke its right to collective defense, meaning assisting a partner under attack. She emphasized that Japan had to "anticipate a worst-case scenario" regarding the Taiwan Strait.

Japan's Defense Minister, Shinjiro Koizumi, described the encounter as "dangerous and extremely regrettable." In a diplomatic move, China's envoy to Japan, Wu Jianghao, was summoned the following day.

A senior vice-foreign minister, Funakoshi Takehiro, made a "formal complaint" and urged the Chinese government to "guarantee that similar actions do not recur."

Longstanding Points of Contention

Japan and China are also locked in a protracted sovereignty disagreement over the Senkaku Islands, which are known as the Diaoyu in China. The small, uninhabited islands lie between Okinawa and Taiwan.

Additionally, regional tensions continue. Tokyo is deepening cooperation with the US and its partners in the Indo-Pacific region, where a number of nations are engaged in their own maritime) disagreements with Beijing.

China, in turn, asserts extensive territorial claims in the South China Sea, a posture that has drawn international concern.