Diplomatic tensions in East Asia are increasing along with various issues involving large countries such as China, Japan, South Korea and the United States. One of the main factors is the South China Sea territorial dispute which involves overlapping claims from several countries. In recent months, China’s military activity in these waters has intensified, including military exercises involving aircraft carriers and fighter planes, sparking concern among neighboring countries. On the other hand, Japan and South Korea also face tensions that are no less significant, especially related to past historical issues and trade. Statements by the leaders of the two countries are often in the spotlight, bringing to the surface old wounds that are difficult to heal. Japan’s decision to limit exports of technological materials to South Korea adds complexity to bilateral relations, causing protests on the South Korean side and exacerbating diplomatic tensions. Meanwhile, US relations with China remain tense, especially after the visit of a top US official to Taiwan. There is deep concern in Beijing regarding US support for Taiwan, which it considers part of its territory. In response, China not only increased its military activities around Taiwan but also responded by sending warplanes into Taiwan’s air defense identification zone, causing global concern about a possible escalation of the conflict. Not only that, this tension also has an impact on regional alliances. South Korea and Japan are seeking to strengthen their ties with the US in an effort to contain China’s growing influence. Security forums such as the Quad, involving the US, Japan, Australia and India, demonstrate efforts to build strategic partnerships to face challenges in East Asia, including the threat from North Korea’s nuclear program. In the midst of this tension, diplomats from various countries are trying to create dialogue to defuse the conflict. Multilateral meetings such as the ASEAN Regional Forum (ARF) are an important platform for countries to exchange views and seek peaceful solutions. However, these results are often not satisfactory, because each country maintains its national claims and interests. While diplomatic tensions continue, new issues have also emerged, such as climate change and pandemics that require international cooperation. Countries in East Asia must find ways to collaborate on this global issue, even amidst existing feuds. The solutions taken will be crucial not only for regional stability but also for the welfare of people throughout East Asia. Handling these diplomatic tensions is not only a concern for the countries involved, but also for the international community trying to maintain global peace and stability. Any step towards a peaceful resolution in East Asia will create positive momentum, which could ultimately lead to more harmonious relations in a region known for a long history of tension.