Beyond Search and Rescue: What the Japan-South Korea SAREX Revival Really Means |
Flashpoints | Security | East Asia
Beyond Search and Rescue: What the Japan-South Korea SAREX Revival Really Means
The return of the Japan-South Korea naval search and rescues exercise after a nine-year hiatus reflects strategic convergence, but history still casts a long shadow.
ROK Navy LST-II Cheon Wang Bong-class tank landing ship ROKS Cheon Ja Bong (LST-689) (left) sails alongside JMSDF Kongo-class Aegis destroyer JS Kongo (DDG-173) (right) during a bilateral Search and Rescue Exercise (SAREX) held west of Japan’s Goto Islands on June 7, 2026. The exercise marked the first Japan–South Korea SAREX in nine years.
On June 7, the Japan Maritime Self-Defense Force (JMSDF) and the Republic of Korea Navy (ROKN) conducted a search and rescue exercise (SAREX) west of Japan’s Goto Islands, marking the first such drill between the two navies after a nine-year hiatus.
The exercise involved the Kongo-class Aegis destroyer JS Kongo (DDG-173) and an SH-60K helicopter on the Japanese side, while the ROK Navy deployed ROKS Cheon Ja Bong (LST-689), a Cheon Wang Bong-class tank landing ship. In addition to search and rescue operations, the drill included a link exercise (LINKEX) for tactical data sharing between ships and aircraft, cross-deck helicopter operations, and a photo exercise (PHOTOEX) — elements that build the kind of interoperability applicable well beyond humanitarian missions.
The JMSDF said the exercise improved search and rescue capabilities and strengthened cooperation between the two sides.
The resumption carries considerable symbolic weight. Bilateral defense ties collapsed after a South Korean destroyer allegedly locked its fire-control radar onto a JMSDF P-1 maritime patrol aircraft in December 2018, triggering one of the worst crises in postwar Japan-South Korea defense relations. Exchanges were effectively frozen for years.
A turning point came at the 2024 Shangri-La Dialogue, when the two defense ministers agreed on measures to prevent a recurrence. The January 2026 Yokosuka ministerial meeting then formalized the resumption of SAREX alongside agreements to hold annual defense ministerial meetings and explore cooperation in artificial intelligence, unmanned systems, and space.
Japanese Defense Minister Koizumi Shinjiro described the exercise as “the beginning of a new chapter” in bilateral defense cooperation and is expected to visit Seoul later this month for further talks.
The broader strategic backdrop is difficult to ignore.
North Korea’s advancing nuclear and missile capabilities remain the stated focus of bilateral security cooperation. But China’s expanding naval presence across the East China Sea, South China Sea, and waters around Taiwan, combined with growing uncertainty over future U.S. alliance commitments, has created additional incentives for Tokyo and Seoul to deepen coordination.
Neither government names China in official documents — the January 2026 joint statement refers only to “the increasingly severe security environment” — but the structural pressures are evident. As Japanese Prime Minister Takaichi Sanae and South Korean President Lee Jae-myung moved to stabilize bilateral relations in May, uncertainty........