Japanese Protection Minister Koizumi Shinjiro paid a two-day go to to Seoul on June 27-28 and held direct talks along with his counterpart Ahn Gyu-back. This was Koizumi’s first official journey to South Korea in his present place, reciprocating Ahn’s go to to Tokyo in January. For the 2 leaders personally, it marked their fourth face-to-face assembly since final November, out of six encounters up to now in whole. Unprecedentedly, the 2 ministers collectively visited South Korea’s Black Eagles aerobatic crew on the Wonju Air Base. It was the first time a international protection minister had accomplished so.
The final go to much like Koizumi’s current journey was in September 2025, when then-Japanese Protection Minister Nakatani Gen traveled to Seoul to fulfill his South Korean counterpart Han Min-koo. Whereas Nakatani’s go to symbolized the top of a decade-long diplomatic hiatus between the 2 international locations, the most recent talks additionally marked a big milestone for his or her relations. It was the second time in historical past, repeated after 23 years, that Japanese and South Korean protection ministers have exchanged visits inside a single yr.
Past its symbolic that means, Koizumi’s uncommon talks with Ahn in Seoul additionally signaled the regular strengthening of high-level bilateral protection cooperation between the neighbors. Beforehand, on Might 7, Japan and South Korea held their first “2+2” vice-ministerial talks between their international and protection ministries in Seoul, marking an improve from the unique director-general degree launched in 1998. Koizumi’s journey additionally got here simply weeks after Tokyo and Seoul resumed joint maritime search-and-rescue workout routines (SAREX) following a nine-year hiatus. These indicators point out a exceptional normalization of cooperation between the 2 international locations’ protection authorities because the 2018 incident involving a South Korean naval vessel and a Japanese Maritime Self-Protection Power patrol airplane.
The joint assertion launched after the talks mentioned the 2 sides would proceed creating cooperation between their aerobatic groups (Blue Impulse and Black Eagles). This was thought of an necessary step ahead, provided that Japan had beforehand refused to offer refueling help for the Black Eagles in November 2025 because of the Dokdo/Takeshima territorial dispute; one of many plane within the Black Eagles had taken half in a drill over the islets. Though this doesn’t essentially suggest that South Korean navy aircrafts will obtain refueling help from Japan often, it stays a notable element, because the disputed islets have lengthy been a serious impediment in bilateral relations.
The 2 ministers additionally reaffirmed their dedication to “full denuclearization of the Korean Peninsula and everlasting peace” within the area throughout their talks, simply in the future after a joint China-Russia air drill close to the peninsula. As the USA has repeatedly demanded larger burden-sharing from its allies, together with Japan and South Korea, this conveyed a transparent message: Tokyo and Seoul are advancing a better navy coordination to proactively handle their widespread safety challenges in Northeast Asia, equivalent to North Korea’s nuclear program, Russia-North Korea navy cooperation, and Beijing’s navy buildup.
What drew probably the most consideration, nevertheless, was the absence of any point out of concluding an Acquisition and Cross-Servicing Settlement (ACSA), a navy logistics help pact that Tokyo had lengthy sought to signal with Seoul. Japan pursued the ACSA with South Korea’s Lee Myung-bak administration in 2012, however the deal confronted robust public disapproval in South Korea. Lingering public unease over the ACSA facilities on the priority that it might pave the best way for the deployment of Japanese forces on South Korean territory.
Nevertheless, ACSA talks between the 2 international locations have re-emerged over the past months amid rising uncertainties within the regional safety setting. If signed, a Japan-South Korea ACSA would improve interoperability and facilitate joint actions between the 2 forces, notably in emergencies when U.S. forces in Japan and South Korea require logistical help.
Such prospects, nevertheless, won’t be simple to understand. Seoul is continuing with warning, viewing the difficulty as politically delicate, particularly because the scope of cooperation underneath the ACSA might increase over time. On the one hand, this requires public understanding in South Korea, the place historic resentments of Japanese colonial rule from 1910-1945 stay unhealed. Then again, Seoul should keep away from being drawn into Japanese navy actions led by the U.S. within the broader area past the Korean Peninsula, as Beijing or Pyongyang might interpret this as Seoul intentionally tightening trilateral cooperation with Washington and Tokyo. The implications could be detrimental for South Korea, notably when the Lee Jae-myung administration is attempting to take care of balanced relations with the U.S., Japan, China, and Russia to safe help for resuming talks and enhancing ties with Pyongyang.
Total, the most recent defenseminister talks as soon as once more demonstrated Tokyo and Seoul’s constant dedication to constructing a “future-oriented partnership,” as agreed by the 2 heads of state. With the present frequency of intensive “shuttle diplomacy,” reciprocal visits and common protection talks between Japan and South Korea are anticipated to proceed, at the very least underneath the present administrations.
