South Korea’s Lee Heads to Japan Summit as Seoul Balances China and Tokyo

South Korean President Lee Jae Myung is set to meet Japanese Prime Minister Sanae Takaichi in Nara on Tuesday, just a week after holding talks with Chinese President Xi Jinping.

South Korean President Lee Jae Myung is set to meet Japanese Prime Minister Sanae Takaichi in Nara on Tuesday, just a week after holding talks with Chinese President Xi Jinping. The closely timed summits underline Seoul’s effort to pursue what Lee has called “pragmatic diplomacy,” carefully balancing relations with its two powerful neighbours amid rising regional tensions.

The meeting comes at a sensitive moment, with relations between Beijing and Tokyo deteriorating over security and Taiwan. Analysts say the timing gives Japan an opportunity to reinforce cooperation with South Korea, particularly within the framework of U.S.-Japan-South Korea ties, while Seoul seeks to avoid being drawn into taking sides.

Balancing China and Japan
Lee’s diplomatic approach aims to keep relations with both China and Japan on an even footing, a strategy South Korean officials believe could ease cooperation in areas such as trade, technology and investment. Lee has stressed that ties with Japan are as important as those with China, signalling Seoul’s intention to remain flexible despite pressure from competing regional dynamics.

Japan, facing strained ties with Beijing, may see closer coordination with South Korea as strategically valuable. Tensions escalated after Prime Minister Takaichi said a Chinese attack on Taiwan could pose an existential threat to Japan, remarks that angered Beijing. Against this backdrop, analysts expect Tokyo to emphasise the importance of trilateral cooperation with Washington and Seoul as a stabilising force.

South Korean officials have acknowledged that the Japan-China dispute may come up during the summit, but observers say Seoul is unlikely to align itself openly with either side. Maintaining room to manoeuvre remains central to Lee’s foreign policy calculus.

Security and Economic Agenda
Longstanding security concerns are expected to feature prominently in the talks. These include North Korea’s nuclear programme and the unresolved issue of Japanese citizens abducted by Pyongyang decades ago. While these topics are perennial, analysts suggest they are unlikely to yield immediate breakthroughs.

More tangible progress may be possible in economic cooperation. Both governments have highlighted potential collaboration in artificial intelligence, semiconductors and intellectual property, as well as measures to ease travel for business executives. Officials say such practical cooperation could deliver visible benefits while avoiding politically sensitive disputes.

The choice of Nara, Prime Minister Takaichi’s home prefecture, also allows Lee to underscore his interest in regional development and cooperation beyond major capitals, aligning with his broader domestic agenda.

Historical Tensions and Diplomatic Continuity
Despite warmer engagement, relations between South Korea and Japan remain burdened by unresolved historical issues stemming from Japan’s colonial rule of Korea, including the treatment of Korean women forced into wartime military brothels. Analysts note that while these issues have receded from the forefront for now, they continue to shape public sentiment in South Korea and could resurface.

Lee’s two-day visit to Japan, shorter than his recent four-day trip to China, is part of ongoing “shuttle diplomacy” agreed by the two countries last year. Both sides see regular high-level contact as essential to rebuilding trust and laying the groundwork for more substantive agreements over time.

Personal Analysis
Lee’s rapid succession of summits with Xi and Takaichi reflects the delicate balancing act facing South Korea as regional rivalries sharpen. By engaging both neighbours in quick succession, Seoul is signalling strategic autonomy rather than alignment, an approach that may help it extract economic and diplomatic benefits while limiting risk.

However, balance is becoming harder to sustain as Sino-Japanese tensions deepen and security issues around Taiwan and North Korea intensify. While economic cooperation offers safe ground for progress, underlying strategic pressures may eventually force clearer choices. For now, Lee’s emphasis on continuity and dialogue suggests that South Korea sees stability itself as an achievement, even if concrete outcomes from the Japan summit remain modest.

With information from Reuters.

Sana Khan
Sana Khan
Sana Khan is the News Editor at Modern Diplomacy. She is a political analyst and researcher focusing on global security, foreign policy, and power politics, driven by a passion for evidence-based analysis. Her work explores how strategic and technological shifts shape the international order.