U.S. Reaffirms Support for Japan After Putin’s Visit to Disputed Islands

A fresh diplomatic dispute has emerged in the Asia-Pacific after Russian President Vladimir Putin traveled to a group of islands claimed by both Russia and Japan, prompting Washington to publicly reaffirm its support for Tokyo’s territorial position. The visit has renewed attention on one of East Asia’s longest-running territorial disagreements and added another layer of tension to relations between Russia and Japan.

On Friday, the United States made clear that it continues to recognize Japanese sovereignty over the islands, despite Russia’s control of the territory and Putin’s decision to visit it. U.S. Ambassador to Japan George Glass said Washington remained firmly behind its longtime Asian ally and continued to recognize Japanese sovereignty over what Tokyo calls the Northern Territories. The statement came shortly after Putin made a rare visit to the disputed islands.

The islands are part of the Kuril chain, stretching between Japan’s northernmost main island of Hokkaido and Russia’s Kamchatka Peninsula. The dispute has remained unresolved since the final days of World War II, when Soviet forces seized the islands. Japan has continued to claim four of them, arguing that they are historically Japanese territory. Russia, however, considers the islands part of its sovereign territory and has maintained control over them for decades.

The disagreement has prevented Moscow and Tokyo from formally concluding a postwar peace treaty, making the territorial question an unusually persistent issue in their bilateral relationship. Putin’s latest trip has therefore carried significance well beyond a simple visit by a Russian president. By traveling to territory that Japan considers its own, the Russian leader has once again placed the dispute at the center of international attention.

The timing is particularly important because relations between Russia and Japan have deteriorated substantially since Russia’s invasion of Ukraine. Japan has joined the United States and other Western countries in imposing sanctions on Moscow, while Russia has responded by taking a harder position toward Tokyo. The latest development demonstrates that the territorial disagreement remains deeply connected to the broader geopolitical competition involving Russia, Japan and the United States.

For Washington, the issue is also closely tied to its alliance with Tokyo. The United States and Japan have maintained a major security partnership for decades, and American officials have repeatedly described Japan as one of Washington’s most important allies in the Indo-Pacific. The U.S. decision to publicly reaffirm Japan’s sovereignty therefore sends a diplomatic message not only to Tokyo but also to Moscow.

It indicates that Washington has not changed its position on the disputed territory, even as the United States continues to manage a complicated relationship with Russia. The statement from Ambassador Glass was particularly direct. He emphasized that American support for Japan remains unwavering and that Washington continues to recognize Japanese sovereignty over the Northern Territories.

That wording matters because territorial disputes can become symbols of much larger strategic disagreements. For Japan, the islands are not simply remote pieces of land. They represent unresolved territorial claims dating back to the end of the Second World War and remain an important issue in Japanese politics and national identity. For Russia, meanwhile, control of the Kuril Islands has strategic importance.

The chain extends into waters connecting the Sea of Okhotsk with the wider Pacific, giving Moscow an important military and geographic position in the region. The dispute has also affected attempts by Japan and Russia to improve their relationship over the years. Previous Japanese governments pursued negotiations with Moscow, hoping to resolve the territorial question and eventually reach a formal peace agreement. Those efforts produced occasional diplomatic progress but never resulted in a final settlement.

The situation became even more difficult after Russia’s full-scale invasion of Ukraine. Japan’s alignment with Western sanctions significantly strained relations with Moscow, while Russia moved to suspend or abandon several areas of cooperation with Tokyo. Against that background, Putin’s decision to visit the disputed territory carries an unmistakably political dimension.

The Russian president has frequently used visits to strategically important regions to demonstrate Moscow’s claim of sovereignty and to underline Russia’s military and political presence. His appearance on the disputed islands sends a message that Russia has no intention of simply giving up control. Japan’s position remains fundamentally different. Tokyo refers to the islands as the Northern Territories and maintains that they are inherently Japanese territory.

Japanese officials have repeatedly emphasized the importance of resolving the dispute while preserving their longstanding territorial claim. The American statement provides Japan with an important diplomatic show of support at a time when Tokyo is dealing with increasingly complicated security challenges in its surrounding region. Japan has faced growing strategic pressure from both China and Russia in recent years.

Chinese military activity around Taiwan and in nearby waters, combined with increased Russian military activity in the region, has encouraged Tokyo to strengthen its defense capabilities and deepen cooperation with Washington. The United States, for its part, has increasingly relied on Japan as a central part of its strategy in the Indo-Pacific. American military forces are stationed in Japan, while the two countries regularly conduct joint exercises and coordinate on regional security issues.

That broader relationship makes Washington’s position on the islands especially significant. The latest dispute also highlights how unresolved issues from the 20th century continue to influence international politics in 2026. More than eight decades after the end of World War II, territorial questions involving Russia and Japan remain capable of triggering diplomatic friction.

The Kuril Islands are not the only territorial issue affecting Japan. Tokyo also has disputes with China over islands in the East China Sea and with South Korea over a separate group of islands. Japan therefore approaches territorial sovereignty as a particularly sensitive national-security issue. Russia’s continued control of the Northern Territories is consequently viewed in Tokyo within a much wider context of regional security.

For Moscow, the situation provides another opportunity to demonstrate that Western pressure has not forced Russia to retreat from its strategic positions in the Pacific. Putin’s visit reinforces the Kremlin’s insistence that the islands are under Russian sovereignty and that Moscow intends to maintain its presence there. For Washington, however, recognizing Japan’s claim represents continuity rather than a new policy. The United States has long supported Japan’s position regarding the Northern Territories.

The latest statement nevertheless carries additional weight because of the current geopolitical environment. With Russia increasingly isolated from many Western governments and Japan closely aligned with the United States, the territorial dispute has become intertwined with the broader divide between Moscow and Washington. The episode also illustrates the difficult position facing Japan.

Tokyo must maintain communication with Russia on issues where cooperation remains necessary while simultaneously defending its territorial claims and supporting international efforts to pressure Moscow over Ukraine. Putin’s visit makes that balancing act even more complicated. Although the latest development does not immediately change who controls the islands, it reinforces the competing positions of the countries involved.

Russia continues to exercise physical control, Japan continues to claim sovereignty, and the United States continues to recognize Tokyo’s position. As a result, the dispute remains far from resolved. The American declaration may reassure Japan that Washington’s position has not shifted, but it is unlikely to produce an immediate breakthrough with Moscow. Instead, it serves as another reminder that the territorial disagreement remains deeply embedded in the strategic rivalry unfolding across the Indo-Pacific.

Putin’s visit has therefore done more than spotlight a remote chain of islands. It has revived a decades-old dispute at a moment when relations between Russia and Japan are already strained and when the United States is placing increasing importance on its alliance with Tokyo. For now, the positions remain firmly divided: Russia maintains control, Japan continues to assert sovereignty, and the United States has once again made clear which side it recognizes in the territorial dispute.