Comprehensive Study Notes on the History and Dynamics of Russian-Japanese Relations (USSR-Japan) Relations

Territorial Disputes: The Primary Source of Tension (1945–1991)

Unresolved territorial disputes between the Union of Soviet Socialist Republics (USSR) and Japan served as the primary source of tension in bilateral relations between $1945$ and $1991$. These disputes defined the conflictual nature of their interaction and prevented the establishment of a full-scale peace settlement following the conclusion of the Second World War. The roots of this issue are directly linked to the events of August $1945$. On August $8$, $1945$, the USSR declared war on Japan, and during August and September, Soviet troops occupied South Sakhalin and the Kuril Islands. While Japan signed the Act of Capitulation on September $2$, $1945$, which formally ended the hostilities, the question of the ownership of certain territories remained open.

The central focus of the dispute involves four islands in the southern part of the Kuril chain: Iturup, Kunashir, Shikotan, and the Habomai group of islands, which Japan refers to as its "Northern Territories." According to the material "Russia and Japan: Why the Kurils Matter," Japan maintains that these islands are not part of the Kuril Islands in the narrow historical-legal sense and, therefore, are not subject to wartime agreements. Conversely, the USSR considered these islands a legitimate part of its territory as a result of its victory in the war, a status reinforced by its actual physical control over the region.

Post-war attempts to resolve the territorial issue occurred within the context of the emerging international system. In $1951$, the San Francisco Peace Treaty was signed between Japan and most of the Allied powers. However, the USSR refused to sign it, viewing the treaty as detrimental to its strategic interests. As Boris Sokolov emphasizes, the absence of a clearly defined status for the Kuril Islands in this treaty became a primary cause for further escalation, as Japan refused to recognize Soviet sovereignty over the disputed areas.

A significant milestone in bilateral relations was the signing of the Joint Declaration on October $19$, $1956$, which restored diplomatic relations between the USSR and Japan. In this document, the USSR agreed to transfer the islands of Shikotan and Habomai to Japan after the conclusion of a formal peace treaty. However, the status of Iturup and Kunashir remained unresolved. Michito Tsuruoka notes that while this declaration was a compromise, it failed to solve the problem entirely because Japan continued to insist on the return of all four islands.

Subsequent relations were further complicated by the geopolitical context of the Cold War. In $1960$, Japan signed a new security treaty with the United States of America, which allowed for the placement of American military bases on Japanese territory. The USSR responded by stating that such an alliance made the transfer of even a portion of the disputed territories impossible, as they could be used to house the military infrastructure of a state viewed as a strategic adversary. Research titled "Japanese-Russian Relations and Their Significance for the Alliance Between the United States of America and Japan" underscores how this factor effectively frozen the negotiation process.

Throughout the $1970s$ and $1980s$, the territorial problem remained the main obstacle to the normalization of relations. Although economic cooperation gradually expanded, political dialogue was constrained by the lack of a peace treaty. Taisuke Abiru points out that Japan consistently maintained that no full peace treaty could be concluded without resolving the "Northern Territories" issue. Meanwhile, the USSR insisted on the inviolability of post-war borders and refused to even acknowledge the existence of a territorial dispute. By the late $1980s$, during the Perestroika era, new opportunities for dialogue emerged. In $1991$, USSR President Mikhail Gorbachev visited Japan, marking the first such visit in history. During negotiations, both sides confirmed the existence of the territorial problem and expressed readiness for further discussion. Homa N.M. and Nikolaeva M.I. note that this step had significant symbolic value as the dispute was officially recognized for the first time, even though no concrete solutions were reached.

The Evolution of Political Dialogue in the Post-Soviet Era

The political dimension of the Russian-Japanese interstate dialogue after the Cold War is characterized by a drive for normalization tempered by fundamental contradictions regarding the territorial issue. After the dissolution of the USSR in $1991$, the Russian Federation inherited all key aspects of the relationship with Japan, including the unresolved question of the "Northern Territories." This inheritance dictated the limited nature of political dialogue in the following decades.

In the $1990s$, both nations took steps to revitalize political engagement. A major event was President Boris Yeltsin's visit to Japan in October $1993$, where the Tokyo Declaration was signed. This was the first time in the post-Cold War era that both sides officially acknowledged the territorial problem and agreed to continue negotiations for a peace treaty. Boris Sokolov suggests that while the Tokyo Declaration was a vital step, it did not lead to a resolution because both parties' fundamental positions remained diametrically opposed.

Political dialogue continued via regular high-level meetings. In $1997$, a meeting in Krasnoyarsk between President Yeltsin and Japanese Prime Minister Ryutaro Hashimoto resulted in a statement of intent to sign a peace treaty by the year $2000$. This intention was reaffirmed in the $1998$ Moscow Declaration. However, Michito Tsuruoka highlights that these agreements were never implemented because of the continued inability to reach a compromise on the islands.

When Vladimir Putin came to power in $2000$, the dialogue received fresh momentum. During Putin’s $2001$ visit to Japan, the Irkutsk Declaration was signed, which confirmed the validity of the $1956$ Joint Declaration as a basis for further talks. This meant Russia formally recognized the possibility of transferring Shikotan and Habomai after a peace treaty, though Iturup and Kunashir remained off the table. Taisuke Abiru notes this reflected a pragmatic Russian stance—maintaining control over strategic territories while demonstrating a willingness to compromise.

During the $2000s$, the dialogue was uneven, influenced by global international relations and internal politics. Japan, as an ally of the United States, had to consider its strategic partner's position. The study "Japanese-Russian Relations and Their Significance for the Alliance Between the United States of America and Japan" notes that the security alliance between Tokyo and Washington remained a limiting factor for full political rapprochement with Moscow.

A new attempt at activation occurred in the $2010s$ under Japanese Prime Minister Shinzo Abe. In $2016$, Abe proposed an "eight-point plan" designed to develop cooperation in various fields, including economy and infrastructure, to create favorable conditions for solving the territorial issue. This approach aimed to build trust gradually. In $2018$, during a meeting between Putin and Abe in Singapore, they agreed to intensify negotiations based on the $1956$ Joint Declaration. However, Taisuke Abiru emphasizes that these talks faced severe difficulty concerning security issues and the potential for US military infrastructure to be placed on any transferred territories.

After $2022$, the political dialogue deteriorated sharply following the full-scale invasion of Ukraine by the Russian Federation. Japan joined the sanctions imposed by the US and its allies, leading to an actual freeze of peace treaty negotiations. Researchers Serhii Korsunskyi and Yurii Panchenko state that these events restored tension and returned the relationship to a state of confrontation.

The Economic Component: Energy, Investment, and Strategic Asymmetry

The economic component of Russian-Japanese relations in the post-Soviet period was shaped by a combination of mutual interest in trade, energy, and investment, set against the backdrop of political limitations. For a long time, economic dialogue was more pragmatic than political dialogue, but the two were never fully separated. Japan viewed Russia as an important neighbor and energy source but remained cautious due to security risks and political disputes.

In the $1990s$, economic interaction was slow. Russia was experiencing a deep economic crisis post-USSR collapse, which limited its capacity as a trade partner. While Japan was interested in Russian natural resources in the Far East and Siberia, it hesitated to make large investments. Boris Sokolov notes that the lack of a peace treaty and the Kuril dispute hindered full-scale cooperation. Despite this, practical ties were built in fishing, maritime transport, and regional trade.

The development of the Russian Far East was of particular importance to Japan due to geographic proximity. However, weak infrastructure, an unstable legal environment, and political risks prevented this interest from becoming a stable economic presence. Japanese economic policy toward Russia was not just commercial but strategic; Tokyo aimed to use economic cooperation to create favorable conditions for political dialogue.

In the early $2000s$, energy became the central sphere of cooperation. As Russia's internal situation stabilized and energy prices rose, it became more attractive to Japanese business. Projects on Sakhalin Island, specifically the "Sakhalin-1" and "Sakhalin-2" oil and gas developments, formed the bedrock of bilateral economic interaction. These allowed Japan to secure its energy needs while Russia received necessary investment and technology.

The $2010s$ saw a new phase driven by Shinzo Abe’s policy. His $2016$ program for economic cooperation included eight directions: medicine, urban infrastructure, energy, small and medium business development, industrialization of the Far East, high technology, and humanitarian contacts. Michito Tsuruoka describes this as an attempt to use economic closeness as a tool for building trust. Taisuke Abiru observes that after Abe left office, the economic logic remained, but the political impulse weakened as the international security situation worsened.

A clear asymmetry has always existed: Russia was an important but not key economic partner for Japan, whereas Japan was a critical source of technology and investment for Russia, especially for its eastern regions. Economic cooperation was often used to prevent total degradation of the relationship. However, Japan was never willing to fully decouple economy from politics, and Russia never showed readiness to make territorial concessions. Following the $2022$ invasion of Ukraine, Japan joined Western sanctions against Russian banks, companies, and technology exports. Serhii Korsunskyi and Yurii Panchenko note that the war forced Japan to abandon its cautious rapprochement and return to a hardline stance, effectively ending many economic dialogue formats and limiting investment projects. The security situation has now made the economy entirely dependent on strategic and security-driven decisions.