Japanese Prime Minister Sanae Takaichi didn't mince words when Vladimir Putin stepped foot onto Iturup Island. She called it "absolutely unacceptable."
Putin's surprise trip to the disputed Kuril Islands—known in Japan as the Northern Territories—marked his first presidential visit to the volcanic archipelago. It wasn't just a casual tour. The Russian leader inspected a fish-processing plant, visited a local hospital, and chatted with students, all while Russia's Pacific Fleet conducted live military drills nearby.
Tokyo snapped back instantly. Foreign Minister Toshimitsu Motegi summoned Russian Ambassador Nikolay Nozdrev to hand over a severe formal protest. Takaichi herself slammed the trip for wounding public sentiment in Japan and pushing any hope of long-term diplomatic recovery even further out of reach.
The Roots of a Decades-Long Standoff
You cannot understand why this visit caused such political whiplash without looking at history. The dispute centers on four specific islands at the southern end of the 1,300-kilometer Kuril chain: Iturup (called Etorofu by Japan), Kunashir, Shikotan, and the Habomai islets.
Under the 1855 Treaty of Shimoda, these islands were officially recognized as Japanese territory. But the closing days of World War II changed everything. Soviet troops seized the islands in August 1945, forcing out roughly 17,000 Japanese residents.
Moscow insists the takeover was fully legal under post-war agreements like the Yalta Conference. Tokyo argues the exact opposite, maintaining that these four islands are an inherent, non-ceded part of Japan that was never supposed to be abandoned under the 1951 San Francisco Peace Treaty. Because neither side will budge, Japan and Russia have never signed a formal peace treaty to end World War II hostilities.
Why Putin Made the Trip Right Now
Timing is everything in geopolitics. Putin's visit wasn't random. It came directly on the heels of Japan releasing a defense white paper outlining a much more assertive military posture.
Japan has steadily increased defense spending, aligned closely with G7 sanctions against Moscow over the war in Ukraine, and even contributed to NATO mechanisms supporting Kyiv. Putin used his time during the regional naval exercises to accuse Tokyo of shifting its neighborly stance and threatening regional security.
By touching down on Iturup Island, Moscow wanted to send a clear message. Russia is signaling that it refuses to make territorial concessions, regardless of how much Tokyo protests or how tightly Japan aligns its defense strategy with Western allies.
What Happens Next for Tokyo and Moscow
Bilateral ties were already on life support. Since the 2022 invasion of Ukraine, relations have deteriorated to historic lows.
Takaichi's sharp pushback shows that Tokyo won't sweep these provocations under the rug. Japanese officials have made it clear that public anger is hardening. Ordinary citizens are watching, and diplomatic channels are freezing up tighter than ever.
Expect harsher economic countermeasures and stricter enforcement from Tokyo. The Kuril Islands dispute remains an open wound, and neither leader is ready to back down.
