Russia-Japan: The Kuril Islands Dispute Escalates Diplomatic Tensions

Tuesday 18 August 2026 - 07:58

Tensions between Russia and Japan have reached a new diplomatic episode amid a territorial dispute over the Kuril Islands. Moscow summoned Japanese ambassador Akira Muto following Vladimir Putin's visit to the contested archipelago, reviving a historical grievance that continues to weigh on relations between the two countries.

The Japanese diplomat is expected on Tuesday at the Russian Ministry of Foreign Affairs, where he will be received by Russian authorities. This summoning comes just days after a similar action by Tokyo regarding the Russian ambassador in Japan.

A Territorial Dispute Rooted in 1945

At the heart of this new tension lies the status of four southern Kuril Islands. The Soviet Union seized them in 1945, at the end of World War II. Since then, Japan has claimed these territories while Russia considers them an integral part of its territory.

This issue remains one of the main obstacles to a complete normalization of Russo-Japanese relations. Putin's recent visit to the Kurils has thus provoked an immediate reaction from Tokyo.

The Japanese government summoned the Russian ambassador to protest against this visit. Moscow then decided to respond to this move by summoning Akira Muto in turn.

Moscow Denounces Tokyo's Reaction

Russian Foreign Minister Sergey Lavrov sharply criticized the Japanese position. He accused Tokyo's authorities of exceeding what he deemed acceptable limits in their comments regarding the Russian presidential visit.

Moscow initially wished to receive the Japanese ambassador quickly. However, he was unable to attend the Russian Ministry of Foreign Affairs immediately.

This situation raised questions on the Russian side. Russian Foreign Ministry spokesperson Maria Zakharova later indicated that the Japanese diplomat would indeed be present on Tuesday.

A Dispute That Continues to Weigh on Bilateral Relations

The new diplomatic confrontation illustrates the persistent fragility of relations between Moscow and Tokyo. The dispute over the southern Kuril Islands remains particularly sensitive for both countries, each maintaining a firm stance on the sovereignty of the territories in question.

The summoning of Akira Muto is intended to allow Russian authorities to address the recent behavior of the Japanese government as well as the diplomat's role in his functions in Moscow.

Putin's visit to the archipelago has thus reignited a territorial issue that has persisted for several decades. It serves as a reminder that, despite the evolution of international relations and the numerous changes that have occurred since the end of World War II, the question of the Kurils remains a major point of friction between Russia and Japan.