A visit that could have been an ordinary presidential tour has instead reopened one of the most stubborn territorial disputes in East Asia.
Russian President Vladimir Putin travelled to Iturup Island, one of the southern Kuril Islands claimed by both Russia and Japan, on August 13. It was his first visit to the disputed island chain and immediately triggered a strong protest from Tokyo.
For Moscow, the trip was a demonstration of sovereignty over territory Russia administers.
For Japan, it was an unmistakable political provocation.
Japanese Prime Minister Sanae Takaichi called the visit “absolutely unacceptable,” while Foreign Minister Toshimitsu Motegi summoned Russia’s ambassador and lodged a strong protest.
But Putin’s journey carries significance far beyond a disagreement over four remote islands.
It comes at a time when Japan-Russia relations are already deeply strained, regional military activity is increasing and Tokyo is strengthening its security partnerships with the United States and other allies.
Why these islands remain so sensitive
The Kuril Islands stretch between Japan’s northern island of Hokkaido and Russia’s Kamchatka Peninsula.
The dispute centers on the four southernmost islands — Iturup, Kunashir, Shikotan and the Habomai islets.
Russia administers the islands.
Japan calls them the Northern Territories and maintains that they are inherently Japanese territory.
The Soviet Union seized the islands in the final days of World War II, and the territorial disagreement has remained unresolved ever since.
The dispute is so significant that Russia and Japan have never signed a formal post-World War II peace treaty.
That makes the islands more than a geographical disagreement.
They are the unfinished business of a war that ended more than eight decades ago.
Putin’s visit sends a powerful message
Putin’s itinerary on Iturup was carefully symbolic.
He visited a school, a hospital and a fish-processing facility and met local residents and regional officials. The Russian president’s presence was designed to underline Moscow’s message that the islands are not merely claimed by Russia — they are functioning parts of the Russian state.
That is precisely what makes the visit so sensitive for Tokyo.
A territorial claim made from Moscow is one thing.
A Russian president physically standing on the disputed territory is something much more consequential.
It turns a diplomatic position into a highly visible political statement.
Tokyo’s response was immediate
Japan’s government did not leave the visit unanswered.
Foreign Minister Motegi summoned Russian Ambassador Nikolai Nozdrev and formally protested Putin’s presence on Iturup.
Tokyo reiterated that the four islands are Japanese territory based on what it describes as historical facts and international law.
Prime Minister Takaichi went further, warning that Putin’s visit could damage already fragile bilateral relations.
The timing made the situation even more sensitive: the visit came just days before Japan’s annual remembrance of the end of World War II.
For many Japanese, the islands remain closely connected to the country’s wartime history and the displacement of former residents after the Soviet takeover.
This is also about today’s security tensions
The Kuril dispute cannot be separated from the wider transformation of security politics in the Asia-Pacific.
Japan has significantly strengthened its defence capabilities in response to concerns involving China, North Korea and Russia.
Moscow, meanwhile, has expanded its military presence in the Kuril Islands and repeatedly criticized Japan for joining Western sanctions following Russia’s invasion of Ukraine.
Tokyo’s decision to align itself closely with the US and G7 over Ukraine has effectively pushed Japan and Russia even farther apart.
Putin’s visit therefore comes at a moment when the old territorial dispute is colliding with a much newer geopolitical confrontation.
The timing may be the message
The most interesting question is not simply why Putin visited the islands.
It is why he chose to do so now.
The visit followed Russian military activity in the region, including exercises around Sakhalin and the Kuril Islands. It also comes as Japan is becoming increasingly concerned about coordinated pressure from Russia, China and North Korea.
From Moscow’s perspective, visiting Iturup sends several messages simultaneously.
It reinforces Russia’s claim to sovereignty.
It signals that Japanese sanctions will not change Moscow’s position.
And it reminds Tokyo that Russia remains a major military power in Japan’s immediate neighborhood.
The trip can therefore be viewed as both a territorial statement and a broader warning about Russia’s strategic presence in the Pacific.
Russia’s answer to Japan: the islands are ours
Moscow has shown little interest in softening its position.
Russian officials dismissed Japan’s protest and reaffirmed that the islands belong to Russia.
Former Russian President Dmitry Medvedev also reacted dismissively, saying the islands would remain Russian territory.
That leaves little room for diplomatic compromise in the immediate future.
And the political environment is very different from the period when former Japanese Prime Minister Shinzo Abe invested heavily in improving relations with Putin.
Those earlier efforts created some hope that an agreement over the islands might eventually help the two countries conclude a peace treaty.
Today, that possibility appears considerably more distant.
The islands are strategically valuable
The Kurils are not important only because of history.
Their location gives Russia access to the Pacific and helps control maritime approaches between the Sea of Okhotsk and the wider Pacific Ocean.
The surrounding waters are also rich in marine resources, while the islands themselves have strategic military value.
For Japan, the proximity of the disputed territory to Hokkaido makes Russian activity there a direct security concern.
This is why even seemingly symbolic developments can attract serious attention in Tokyo.
A dispute that refuses to disappear
The extraordinary thing about the Kuril Islands dispute is its longevity.
Generations have passed since the Soviet Union took control of the islands.
Governments have changed.
Leaders have come and gone.
Japan and Russia have attempted negotiations, economic cooperation and diplomatic engagement.
Yet the basic disagreement remains.
Putin’s visit shows just how difficult it will be to resolve.
Rather than moving toward a compromise, the two sides are increasingly presenting completely incompatible versions of reality.
Russia is saying: this is Russian territory, and our president can visit it.
Japan is saying: this is Japanese territory, and Russia’s presence there remains unacceptable.
Neither side appears prepared to surrender its position.
What Putin’s visit could mean for the region
The immediate consequence may simply be another deterioration in Japan-Russia relations.
But the longer-term implications could be broader.
Japan is already strengthening its military capabilities and deepening security cooperation with the United States and other partners. Russia is expanding its strategic cooperation with China while maintaining a military presence in the Far East.
That means the Kuril dispute is increasingly becoming part of a larger security puzzle.
A territorial disagreement that once seemed largely bilateral now sits inside a much more complicated contest involving Russia, Japan, China, North Korea and the United States.
That makes every military exercise, diplomatic protest or presidential visit more significant than it might have been a decade ago.
The bigger picture
Putin’s first visit to the disputed Kuril Islands was not simply a trip to a remote Pacific territory.
It was a carefully visible assertion of Russian control at a moment when relations with Japan are already near a historic low.
For Tokyo, the message is deeply unwelcome.
For Moscow, however, the visit reinforces an argument it has maintained for decades: that the post-World War II territorial settlement places the islands within Russia’s borders.
The result is another diplomatic collision over territory that has remained unresolved since 1945.
And perhaps that is the most important takeaway.
The Kuril Islands dispute is no longer just a frozen remnant of World War II. It is becoming increasingly entangled with the new security rivalry taking shape across the Asia-Pacific.
Putin’s arrival on Iturup has therefore done more than provoke Tokyo.
It has reminded the region that one of East Asia’s oldest territorial disputes is still very much alive.
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