The Entry of Russian Military Aircraft into KADIZ Reflects the Vigilance Burden on Japan, South Korea, and the U.S.

According to the South Korean Joint Chiefs of Staff, on the afternoon of the 26th, multiple Russian military aircraft temporarily entered the Korean Air Defense Identification Zone (KADIZ) near Dokdo and Ulleungdo, prompting the South Korean Air Force to scramble fighter jets after prior detection. This does not constitute a violation of sovereign airspace. Nevertheless, to dismiss the significance of such flights with the phrase "there was no legal violation" is precarious.

The Issue is Not the Length of the Incursion, but the Wear on Vigilance

The Air Defense Identification Zone is not sovereign airspace, nor is the act of entering it immediately illegal. However, approaching and briefly entering the identification zone is a typical pressure tactic to gauge the opponent's detection, command, launch, and tracking response times. In this instance, the South Korean military was able to detect the aircraft in advance and respond, but what is crucial is the reality that "we must continue to respond" rather than just the fact that "we were able to respond." In the skies over the East Sea, while each individual incident may be limited, cumulatively, it steadily increases the burden on patrol aircraft, fighter jets, and command personnel.

Political Noise Among Allies Dulls Deterrence in the Skies

This timing is suggestive. The U.S. and South Korea reaffirmed their close communication regarding North Korea, and the U.S. Ambassador to South Korea emphasized the continuation of Japan-U.S.-South Korea cooperation. On the other hand, President Trump has repeatedly justified the decision to reduce exercises in South Korea and has expressed positive sentiments towards his relationship with Kim Jong-un. North Korea has not shown any direct response to the U.S. side in its recent party meeting. In a situation where such political signals are fluctuating, there is greater room for a third party like Russia to assess how mechanically the vigilance posture of Japan, South Korea, and the U.S. is maintained.

What should not be overlooked is that the focus this time is not on "how many minutes the Russian aircraft were inside," but rather on "how long Japan, South Korea, and the U.S. can silently continue to observe the same picture." Deterrence in the skies over the East Sea is not supported by flashy statements, but rather by continuous monitoring and rapid response, especially on days when political noise increases.