South Korea and Japan Leaders Pledge Stronger Ties at Fourth Meeting in Six Months

South Korean President Lee Jae Myung and Japanese Prime Minister Sanae Takaichi held their fourth meeting in six months, agreeing to deepen cooperation on energy security, supply chains, and regional stability. Both leaders pledged closer coordination with the United States and stronger joint responses to shared threats, including North Korea’s nuclear programme and broader US–China tensions. The meeting reflects improving Japan–South Korea relations despite longstanding historical disputes.

South Korean President Lee Jae Myung and Japanese Prime Minister Sanae Takaichi held their fourth meeting in about six months on Tuesday, marking another step in the rapid warming of relations between the two East Asian neighbours.
The talks took place in Andong, South Korea, which is Lee’s hometown, and underscored the unusually high level of engagement between the two governments since both leaders assumed office last year. Despite the long history of diplomatic strain between Japan and South Korea, both sides have increasingly prioritised cooperation in response to shared regional and global challenges.
Relations between Tokyo and Seoul have historically been complicated by disputes stemming from Japan’s 35-year colonial rule over the Korean Peninsula before the end of World War II. These historical grievances have repeatedly influenced political relations, public sentiment, and diplomatic exchanges. However, in recent years, both countries have made gradual efforts to move beyond these issues and rebuild trust, particularly in the face of rising geopolitical uncertainty.
In their latest meeting, Lee and Takaichi focused heavily on strengthening practical cooperation, especially in areas such as energy security, supply chain resilience, and regional stability. Both leaders acknowledged that disruptions in global markets, including recent instability linked to tensions in the Middle East, have made it increasingly important for close allies to coordinate more effectively.
In a joint press statement, Lee Jae Myung said that instability in supply chains and energy markets has highlighted the urgent need for deeper cooperation between Japan and South Korea. He stressed that external shocks affecting energy flows and trade routes require both countries to develop stronger joint responses to protect their economies.
Prime Minister Sanae Takaichi announced a new bilateral initiative aimed at improving energy security and ensuring more stable access to critical resources. The initiative includes expanding strategic energy reserves across the Indo-Pacific region and establishing mechanisms for mutual support, such as swap arrangements involving crude oil, refined petroleum products, and liquefied natural gas (LNG). These measures are intended to help both countries respond more effectively to sudden supply disruptions.
Beyond economic cooperation, both leaders also reaffirmed their commitment to strengthening security coordination. This includes closer collaboration not only between Japan and South Korea but also with the United States, which remains a key security partner for both countries. The discussions reflected growing concern over the evolving security environment in East Asia.
One of the major shared concerns is North Korea’s expanding nuclear weapons programme and its continued missile testing, which both Seoul and Tokyo view as a direct threat to regional stability. In addition, the broader strategic competition between the United States and China continues to shape security calculations across the Indo-Pacific, increasing the importance of coordinated diplomatic and defence responses among allied nations.
Lee also highlighted progress in what is known as “shuttle diplomacy,” a diplomatic approach that encourages frequent reciprocal visits between leaders to maintain steady communication and reduce tensions. According to him, the two countries have already held six meetings under this framework since he took office, signalling an unusually active phase in bilateral engagement compared to previous years.
Analysts note that this level of engagement reflects a broader strategic shift, as both Japan and South Korea seek to stabilise their relationship in order to better navigate regional uncertainties. While historical disputes have not been fully resolved, they are increasingly being managed in parallel with practical cooperation on security and economic issues.
The momentum in relations was further built on initiatives introduced by their predecessors in 2023, when both governments began making deliberate efforts to ease tensions and expand collaboration. Those early steps laid the groundwork for the current period of intensified dialogue, which now includes regular high-level meetings and coordinated policy discussions across multiple sectors.
Overall, the latest meeting in Andong reinforces a growing recognition in both capitals that closer cooperation is essential for addressing shared challenges, even as long-standing historical sensitivities continue to exist beneath the surface of their improving diplomatic ties.