"If you don’t have teeth, you have to rely on your gums." This saying aptly describes the current situation for South Korea and Japan in light of international dynamics. While the North Korea-China-Russia coalition is solidifying, the once-stable U.S.-led alliance is showing signs of strain.
Chinese President Xi Jinping and Russian President Vladimir Putin reaffirmed their commitment to strengthening strategic cooperation against the U.S. during a summit in Beijing this week. The two countries have already been closely aligned in military, economic, and diplomatic matters, and recent developments suggest an even deeper bond. Speculation about Xi's potential visit to North Korea further indicates that the North Korea-China-Russia alliance is gaining strength.
The challenge lies in the fact that the trilateral cooperation among South Korea, the U.S., and Japan does not appear as stable as before. The most significant variable is undoubtedly the United States. Since taking office, the Trump administration has prioritized "America First," adopting a harsh diplomatic stance that has affected both allies and adversaries alike. Pressures for increased defense spending, tariff threats, and unpredictable foreign policy have created unease not only for South Korea and Japan but also for European allies. Furthermore, as the U.S. becomes embroiled in conflicts in the Middle East, concerns about its diminishing power are being raised. Amidst joint criticism of the U.S. and Japan by Xi and Putin, South Korea cannot afford to feel complacent.
Of course, the U.S. power is not going to vanish overnight. Its military strength, dollar dominance, and advanced technological capabilities remain formidable. However, the core issue is trust. The essence of an alliance is not merely military might but the ability to rely on each other. With President Trump frequently calling for U.S. troop withdrawals, allies are finding it increasingly difficult to place their trust in the United States.
In this context, the strategic importance of South Korea-Japan cooperation has never been greater. This week’s visit by Japanese Prime Minister Sanae Takaichi to South Korea underscores this significance. It represents a foundation for both countries to create a safety net for their survival, independent of reliance on the U.S.
However, deep historical wounds and emotional rifts still exist in South Korea-Japan relations. Issues such as forced labor and comfort women cannot be easily dismissed. Yet, the international landscape is unforgiving. If South Korea and Japan remain mired in past grievances while North Korea, China, and Russia rapidly align under shared strategic interests, they risk suffering the consequences.
Moreover, cooperation between South Korea and Japan is essential for future industrial competition. In key sectors like semiconductors, batteries, artificial intelligence, supply chains, and energy security, the two nations are both competitors and collaborators. As China seeks to expand its dominance over global supply chains through technological advancements, South Korea and Japan must work together to effectively respond.
History repeatedly shows that nations that unite in times of crisis survive. The world is moving toward a new era of bloc formation. As North Korea, China, and Russia strengthen their alliances, a time is emerging when the U.S. can no longer be taken for granted. Consequently, South Korea and Japan can no longer afford to dwell solely on emotions and the past. As uncertainties surrounding the U.S. grow, cooperation between South Korea and Japan is evolving from an option to a survival strategy.
* This article has been translated by AI.
Copyright ⓒ Aju Press All rights reserved.