South Korea's Joint Chiefs of Staff detected several ballistic missiles launched from the Pyongyang area toward the East Sea at approximately 9:20 a.m. on October 12, with at least one type flying more than 900 kilometers [1][12][15]. Japan's defence ministry separately confirmed the launch, assessing that two projectiles likely fell outside Japan's exclusive economic zone, and Japan's coastguard tracked two unidentified projectiles believed to be ballistic missiles [22][24][2][4]. South Korea's military said it stepped up surveillance and was sharing information with the United States and Japan while maintaining an all-out readiness posture [15][6].

South Korea's Joint Chiefs of Staff spokesperson Jang Do-young said initial analysis suggested the launch was "a protest against the successful launch of our hypersonic glide vehicle (HGV) and a display of the North's achievements under its five-year plan to bolster defense capabilities and a deliberate show of its missile capabilities" [16]. The launch came four days after President Lee Jae Myung oversaw South Korea's first publicly disclosed test-firing of a domestically developed hypersonic glide vehicle, which the presidential office described as "a new deterrence capability capable of striking key targets within the Korean Peninsula's operational environment" [2][4][5]. Lee described the test as an important step in strengthening the country's defense capabilities [10][30]. The competing tests have been framed by multiple outlets as an inter-Korean hypersonic competition, with North Korea having tested missiles more than ten times this year, including four times in October alone [19][20][4].

South Korea's National Security Office convened an emergency meeting with the Defense Ministry and Joint Chiefs of Staff and demanded North Korea immediately halt its repeated ballistic missile launches, calling them "grave acts that violate UN Security Council resolutions and are of no help to managing the current situation on the Korean Peninsula" [14][18][3]. Japan lodged a stern protest through an embassy route, and Parliamentary Vice Defense Minister Takashi Koyari condemned the launches as contravening relevant UN Security Council resolutions, with details including whether an irregular trajectory was flown still being analyzed [22][24]. Prime Minister Sanae Takaichi instructed government offices to gather and analyze information, share it quickly and accurately, and ensure safe navigation [22]. The European External Action Service had earlier condemned North Korea's October 3 launch as "another violation of UN Security Council resolutions" that "threatens regional and international security," calling on Pyongyang to comply with its obligations and re-engage in a meaningful diplomatic process [23][28]. China's foreign ministry, asked about reports that North Korea had fired more than ten ballistic missiles — a higher count than the "several" projectiles described by Seoul and the two tracked by Tokyo — said it noted the reports and had no new comment [25]. Russian state media, by contrast, carried the launches as a brief report of several rockets fired toward the Sea of Japan [26].

Kim Yo Jong, sister of North Korean leader Kim Jong Un, said the October 3 missile test featured a weapon "capable of changing its flight orbit at a low altitude and AI was introduced into it," making it nearly impossible to intercept [5][29][10]. Kim Jong Un stressed the need to "continue without interruption our responsible efforts to continually and repeatedly make our adversaries recognize the reliability and lethality of our strategic offensive means" [19][29]. Kim Jong Un continues to reject US and South Korean offers to resume diplomacy, with no negotiations held between Pyongyang and Washington since 2019 [2][30].

The missile launches unfolded against the backdrop of a dispute over a September 21 landmine explosion inside the Demilitarized Zone that injured three South Korean soldiers. Seoul attributed the blast to Pyongyang and conditioned any improvement in relations on an apology [5][6][13]. Pyongyang denied responsibility, accused Seoul of fabricating its investigation findings, and warned of "immediate and merciless" retaliation if Seoul takes counteraction [15][16]. Kim Yo Jong dismissed Seoul's apology demand as "despicable," rejected an offer of medical equipment from the South, and said that if South Korea "truly wish(es) to restore relations between the DPRK and South Korea, they should be mindful of the other side's feelings in every word and deed, and first demonstrate the utmost respect, consideration and sincerity" [3][13].

A conciliatory track diverges from the alliance's condemnation stance. President Donald Trump ordered the Pentagon to significantly reduce joint military exercises with South Korea, citing his good relations with Kim Jong Un, and instructed Defense Secretary Pete Hegseth to reduce US participation in the Ulchi Freedom Shield exercises [28]. The EU rejected Trump's conciliatory approach, with an EEAS spokesperson stating that "continued missile launches and nuclear expansion are a serious threat to regional and global security" [28]. Lee had pledged to reopen dialogue with North Korea after taking office [2]. CNA reported concerns that Seoul could be sidelined in US-North Korea talks [3].

South Korea, the United States, and Japan continue to share information and analyze the missiles' specifications [15][20][21]. The Joint Chiefs of Staff declined to specify whether the missiles were hypersonic or intermediate-range [16]. No diplomatic engagement is currently scheduled between Pyongyang and either Seoul or Washington [2].