13 August 2025

China’s J-20 Stealth Fighter Allegedly Flies Undetected Over Tsushima Strait, Exposing Gaps in Japan and Korea’s Radar Defences


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(DEFENCE SECURITY ASIA) — In a stunning revelation that could redefine the balance of airpower in East Asia, China’s J-20 stealth fighter has reportedly flown a mission over the Tsushima Strait — without being detected by Japanese or South Korean radar systems.

The claim, while unconfirmed by Tokyo or Seoul, was strongly implied in a recent segment aired by Chinese state broadcaster CCTV, which spotlighted the elite First Fighter Brigade of the People’s Liberation Army Air Force (PLAAF).

Although the program did not explicitly name the aircraft involved, it featured uninterrupted footage of the J-20, China’s fifth-generation air superiority stealth jet, and described patrols over both the Bashi Channel and the Tsushima Strait — two of the most sensitive aerial corridors in the Indo-Pacific.

The broadcast, dated July 29, referred to flight operations conducted on Sunday, July 27, and boldly stated that “the 1st Aviation Brigade of the PLAAF now flies missions over the Bashi Channel and Tsushima Strait, and conducts patrols around Taiwan.”

This brigade was among the first PLAAF units to be equipped with the J-20, which is believed to be deployed in growing numbers, including a new two-seat J-20S variant that enhances command-and-control and potential loyal wingman drone coordination.

The Tsushima Strait — a narrow, strategic maritime chokepoint separating South Korea and Japan — links the Sea of Japan to the East China Sea and is among the most heavily surveilled airspaces in the world.


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