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Japan's prime minister, Sanae Takaichi, committed to respond "in a composed yet firm manner" following accusations that Chinese military aircraft acquired a radar lock on Japanese F-15s south-east of Okinawa's main island during the weekend.

An Concerning Aerial Encounter Detailed

According to Japan's defence ministry, China's J-15 jets from the aircraft carrier Liaoning activated its targeting radar on Japanese F-15s twice on Saturday. The first incident took place at 4:32 p.m. and occurred again about two hours. The ministry stated that visual confirmation could not be obtained due to the range involved, and confirmed that there was no damage or injuries were reported.

"This was an unprecedented instance the Japanese defence ministry has reported such an incident," a report noted. Military aircraft commonly use radar for tracking purposes.

Official Objection and Denials

In response to the allegations, the Chinese military issued a declaration dismissing them as "totally contrary to reality." The statement urged Tokyo to "cease slandering and smearing." Conversely, Beijing asserted that Japan's Self-Defense Forces aircraft had "posed a grave risk to flight safety" by repeatedly approaching China's exercise areas. Beijing did not mention any radar targeting.

A spokesperson for China's Ministry of Foreign Affairs later urged Japan to "halt its provocative actions of interfering with our routine drills and exercises."

Escalating Strains and Broader Background

Relations linking Beijing and Tokyo have deteriorated significantly in recent weeks. This cooling followed Prime Minister Takaichi remarked that hostilities against Taiwan could trigger the deployment of Japan's military should such a conflict posed an extreme danger to Japan.

She argued that Tokyo could invoke its legal authority to collective self-defence, meaning assisting an ally. She stated that her country had to "anticipate a worst-case scenario" regarding the Taiwan Strait.

The Japanese Defense Minister, Shinjiro Koizumi, labeled Saturday's encounter as "dangerous and extremely regrettable." In a diplomatic move, China's ambassador to Japan, Wu Jianghao, was called in the following day.

A senior vice minister for foreign affairs, Funakoshi Takehiro, lodged a "formal complaint" and urged Beijing to "guarantee that such acts are not repeated."

Enduring Disputes

The two nations are also locked in a protracted sovereignty disagreement over the islands, which are known as the Diaoyu by Beijing. The small, unoccupied islets lie between Okinawa and Taiwan.

Furthermore, broader geopolitical tensions continue. Japan is strengthening cooperation with American and its partners in the Indo-Pacific region, where several nations have similar maritime) disagreements with China.

Beijing, for its part, maintains extensive sovereignty claims in adjacent seas, activities that has drawn international concern.