With U.S. encouragement, Northeast Asia has seen unprecedented cooperation between Japan and South Korea in recent years. But rising economic frictions, domestic political changes in Japan and especially South Korea, and evolving U.S. global priorities could impede or even reverse recent gains.

Following months of political turmoil, South Korea's upcoming presidential election could lead to a shift in the country's approach to the U.S.-China rivalry, with candidates' stances influencing South Korea's policies on defense, trade, and diplomatic relations with both powers. While Lee Jae-myung may seek closer ties with China, potentially boosting trade and cultural exchanges, his rival is expected to strengthen South Korea's alignment with the U.S., especially on security and technology-related matters.

The tariffs will not spell the end of alliances between the United States and Japan or South Korea, but they are likely to promote a strategic awakening in both countries and accelerate the integration process in East Asia.

A positive peace is needed, one that weaves prosperity and security together for all. The DPRK’s economic connection to the world via Russia is a potential game changer that could reframe possibilities for the Korean Peninsula, and with it impact the dynamics of the North Asia region. Regional leaders should take up the challenge.

China-Japan-ROK cooperation is not aimed at the United States, and it should not be constrained. The sustainability of future trilateral cooperation by China, Japan and the ROK ultimately depends on the continual development of internal dynamics of the three countries.

Progress has been made by the United States to institutionalize three-way strategic cooperation with the ROK and Japan. Under this framework, North Korea, China and Russia are all targeted as America attempts to counterbalance China collectively and comprehensively. The concept is doomed.

Trilateral cooperation between the United States, Japan and South Korea seems to have solidified recently, although they have not announced a formal alliance. But differences in their views on China and deep-rooted frictions will likely hinder the ongoing pace of concerted action.

South Korea’s relationship with the U.S. as a protectorate has benefited Seoul strategically and economically. As tensions between China and the U.S. change the geopolitical climate of the region, South Korea may want to reevaluate the cost of a large U.S. military presence in their territory.

Amid rising geopolitical tensions in the Indo-Pacific region, the Biden administration orchestrated a significant breakthrough by fostering closer relations between South Korea and Japan. This shift is underscored by a recent trilateral summit involving the U.S., Japan, and South Korea, where leaders addressed shared challenges posed by China and North Korea. This collaboration signifies a critical step towards regional security, economic resilience, and a unified approach to navigating the dynamics of the Indo-Pacific.

The Biden administration recently wrapped up two important state visits with President Yoon Suk Yeol of South Korea and President Ferdinand Marcos of the Philippines. The meetings signify that Biden is on a trek to improve and affirm ties with key Indo-Pacific countries, but it must continue this trend if the U.S. wishes to remain relevant in the region.