RUSSIA JAPAN RELATIONS | A COMPLEX MULTI-LAYER STORY

Global Affairs Session 62 2 July 2026

RUSSIA AND JAPAN

A complex relationship

Russia and Japan share a strategic relationship defined by proximity, rivalry, and unfinished war. From border treaties and the 1904–05 war to the unresolved Kuril/Northern Territories dispute, energy dependence, sanctions over Ukraine, and Japan’s U.S. alliance, cooperation remains limited while security mistrust deepens across Northeast Asia.

Kuril & Sakhalin dispute Japan's rise 1500–1950 timeline 1950s–2026 timeline Growth models Rivalries America's role

Kuril and Sakhalin: the unresolved territorial dispute

Russia and Japan remain divided by two linked territorial questions in the Sea of Okhotsk: the Kuril Islands, which Tokyo calls its Northern Territories, and Sakhalin, whose energy projects still tie the two economies together despite the freeze in diplomacy.

• Kuril dispute. Japan claims four southern Kuril islands, calling them Northern Territories; Russia controls them since 1945. The dispute blocks a World War II peace treaty and still fuels strategic mistrust today.
• Sakhalin dispute. Sakhalin was historically contested: Japan ruled the southern half after 1905, but the Soviet Union took it in 1945. Today Japan makes no active sovereignty claim over Sakhalin Island itself.
• Treaty history. The Treaty of Shimoda (1855) and the Treaty of Saint Petersburg (1875) fixed the early border between Etorofu/Iturup and the Kuril chain, leaving the roots of today's Northern Territories dispute in place for over a century.
• Sakhalin energy projects. Major oil and gas facilities such as Sakhalin-2, significant Japanese investment from firms like Mitsui and Mitsubishi, and LNG supply for Japan sit alongside geopolitical risks and shifting ownership structures.

Japan's rise: victories over China and Russia

Two wars a decade apart announced Japan's arrival as a modern military power and set the terms for a century of wary relations with Moscow.

• Japan beat China, 1895. In the First Sino-Japanese War, Japan defeated Qing China, gained Taiwan, influence over Korea, and proved it had modernised faster than China militarily and politically.
• Japan beat Russia, 1905. In the Russo-Japanese War, Japan defeated Russia, gained influence in Korea and southern Manchuria, shocking Europe by proving a modern Asian power could win decisively.

Historical relationship since 1500 AD till 1950

Russia-Japan contact emerged late and grew through a sequence of border treaties, one decisive war, and an unresolved peace that still shapes the relationship today.

• 1500s–1700s: no major direct relationship at first. Japan was focused on East Asian maritime trade and internal consolidation, while Russia was expanding eastward across Siberia. Serious Russia-Japan contact emerged much later, especially as Russian explorers, traders, and naval missions reached the North Pacific.
• 1855: first formal border arrangement. The Treaty of Shimoda, signed on February 7, 1855, established diplomatic relations and fixed the boundary between Etorofu/Iturup and Uruppu/Urup, leaving the later Northern Territories/Kuril issue rooted in this early border history.
• 1875: Sakhalin-Kuril exchange. Under the Treaty of Saint Petersburg, Japan gave up claims to Sakhalin while Russia gave Japan the Kuril Islands. This made the northern island frontier clearer, but later wars and treaties reopened the dispute.
• 1904–05: Japan defeated Russia. The Russo-Japanese War shocked the world because an Asian power defeated a major European empire. The Treaty of Portsmouth, brokered partly by U.S. President Theodore Roosevelt, recognised Japan's position in Korea and south Manchuria and transferred southern Sakhalin to Japan.
• 1941–50: neutrality, Soviet attack, and unresolved peace. Japan and the USSR signed a neutrality pact in 1941, but the Soviet Union denounced it in 1945 and entered the war against Japan in August 1945. The USSR occupied the southern Kurils/Northern Territories, and by 1950 no formal peace treaty had been concluded.

Russia versus Japan since the 1950s till 2026

Diplomatic relations were restored in 1956, but seven decades on, the peace treaty that Article 9 of that declaration promised still has not been signed.

• 1956: relations restored, but peace treaty delayed. The Soviet-Japanese Joint Declaration ended the state of war and restored diplomatic relations, but left the territorial dispute unresolved; Article 9 said negotiations for a peace treaty would continue, with Habomai and Shikotan to be transferred after a treaty.
• Cold War: Japan stayed in the U.S. camp. Japan became a key American ally in Asia, while the USSR treated the U.S.-Japan alliance as a strategic problem near its Far Eastern frontier. This made the island dispute harder to solve.
• 1991–2010s: economic openings, but no settlement. After the Soviet collapse, Japan and Russia explored energy, trade, and peace-treaty talks, but sovereignty over Etorofu/Iturup, Kunashiri/Kunashir, Shikotan, and Habomai blocked full normalisation.
• 2022: Ukraine war froze relations. After Russia's full-scale invasion of Ukraine, Japan joined G7 sanctions; Russia suspended peace-treaty talks and related cooperation, while Japan said the crisis was caused by Russian aggression and kept its policy of resolving the Four Northern Islands issue.
• By June 2026: relations were near zero, but energy links remained. In February 2026 the Kremlin said there was no ongoing peace dialogue with Japan, while Japan still needed to protect some business and energy interests, including Sakhalin-related assets and imports under sanctions waivers.

Comparison of growth models

Japan's industrial, technology-heavy model and Russia's resource-heavy, state-centred model face very different reform pressures as both economies head toward 2040.

• Japan: industrial, export-led, technology-heavy. Postwar Japan grew through manufacturing exports, disciplined private firms, keiretsu networks, technology absorption, high savings, quality control, and state guidance under a U.S.-backed security umbrella.
• Russia: resource-heavy and state-centred. Russia's modern economy depends heavily on oil, gas, minerals, defence, state-linked firms, and geopolitical control of strategic sectors. Energy exports remain central to revenue, influence, and external vulnerability.
• Japan is a mature high-income economy with aging and debt problems. The OECD's 2026 Japan survey said Japan's gross public debt was around 206% of GDP in 2024 and that population aging will intensify fiscal pressure, making productivity revival essential.
• Russia is a war- and sanctions-shaped economy. The World Bank expected Russian growth to slow to an average of about 1.3% in 2025–26 because of capacity constraints, higher borrowing costs, tighter sanctions, and lower energy prices.
• By June 2026, both faced different reform needs. Japan's draft 2026 blueprint targeted real growth above 1% and large public-private investment through 2040, while Russia's challenge was avoiding long-term stagnation from sanctions, war spending, energy dependence, labour shortages, and isolation from advanced Western markets.

Rivalries

Territorial, military, energy, and diplomatic frictions have compounded since 2022, turning a distant, low-intensity rivalry into an openly adversarial relationship.

• Core rivalry: Kuril/Northern Territories dispute. Japan calls the four islands its Northern Territories; Russia administers them as part of the southern Kurils. This dispute is the main reason the two countries still lack a World War II peace treaty.
• Military rivalry in the North Pacific. Japan protests Russian military buildup and exercises around the Four Northern Islands and surrounding waters, seeing them as unacceptable and inconsistent with Japan's position.
• Energy rivalry mixed with dependence. Japan wants to reduce strategic dependence on Russia after Ukraine, but Sakhalin-2 still matters because Russian LNG has supplied about 9% of Japan's LNG imports. This creates tension between sanctions policy and energy security.
• Russia-China alignment worries Japan. As Russia becomes more dependent on China, Japan sees a more coordinated pressure environment in Northeast Asia, especially around the Sea of Japan, the Kurils, Taiwan, and the wider Indo-Pacific.
• Sanctions and retaliation became a new rivalry. Japan imposed sanctions on Russian entities and individuals over Ukraine; Russia retaliated by barring Japanese nationals and reducing diplomatic space, making the relationship more adversarial by 2025–26.

America in this equation

Washington is not a side actor in Russia-Japan relations — it shaped the 1905 settlement, anchors Japan's security today, and increasingly frames Tokyo as a U.S.-aligned pressure point in Moscow's calculations.

• America is Japan's security shield. The U.S.-Japan alliance gives Japan deterrence against Russia, China, and North Korea, and makes Japan a key American base network in Northeast Asia.
• The U.S. shaped the 1905 peace settlement. President Theodore Roosevelt helped broker the Treaty of Portsmouth, which ended the Russo-Japanese War and confirmed Japan's rise as a major regional power.
• The U.S.-Japan treaty complicated Soviet/Russian calculations. After 1956, Moscow linked territorial settlement concerns to the presence of foreign troops in Japan; Japanese documents show the USSR connected the Habomai-Shikotan issue to the revised U.S.-Japan Security Treaty.
• America supports Japan but balances energy realities. The U.S. imposed Russia sanctions, but also issued and extended waivers allowing Sakhalin-2-related imports into Japan, showing that alliance management sometimes requires energy exceptions.
• By June 2026, Russia-Japan relations were part of a wider U.S.-Russia confrontation. Japan's sanctions, Ukraine support, defence buildup, and coordination with Washington made Tokyo look to Moscow less like a neutral Asian neighbour and more like a U.S.-aligned pressure point in the Indo-Pacific.

Value addition

Glossary and related terms

Northern Territories / Kuril Islands

The four southernmost Kuril islands — Etorofu/Iturup, Kunashiri/Kunashir, Shikotan and the Habomai group — claimed by Japan and administered by Russia since 1945.

Sakhalin

A large island north of Japan, historically contested between the two countries and now home to major Russian oil and gas projects with significant Japanese investment.

Treaty of Shimoda (1855)

The first formal Russia-Japan border agreement, establishing diplomatic relations and fixing an early boundary in the Kuril chain.

Treaty of Saint Petersburg (1875)

An agreement under which Japan ceded claims to Sakhalin in exchange for Russia transferring the Kuril Islands to Japan.

Treaty of Portsmouth (1905)

The U.S.-brokered settlement ending the Russo-Japanese War, recognising Japan's position in Korea and southern Manchuria and transferring southern Sakhalin to Japan.

Soviet-Japanese Joint Declaration (1956)

The agreement that ended the state of war and restored diplomatic relations between Japan and the USSR without resolving the territorial dispute.

Keiretsu

Networks of Japanese firms linked through cross-shareholding and long-term business relationships, central to Japan's postwar industrial growth model.

Sakhalin-2

A major Russian oil and LNG project on Sakhalin Island with significant Japanese ownership stakes, central to Japan's continued energy dependence on Russia.

G7 sanctions

Coordinated economic and trade restrictions imposed by the Group of Seven economies on Russia following its 2022 invasion of Ukraine.

LNG

Liquefied natural gas — natural gas cooled to liquid form for shipping, a major component of Japan's energy imports from Russia.

U.S.-Japan Security Treaty

The alliance framework under which the United States provides Japan with defence guarantees and maintains a regional base network in exchange for close strategic coordination.

Value addition

Conceptual references

• Historical treaty analysis of the Kuril/Sakhalin border settlements (Shimoda 1855, Saint Petersburg 1875, Portsmouth 1905).
• Alliance theory and the U.S.-Japan security relationship in Northeast Asia.
• Energy-security literature on LNG dependence and sanctions-driven waivers.
• Comparative growth-model analysis: export-led industrial development versus resource-dependent state capitalism.
• Studies on middle-power hedging amid Russia-China alignment and Indo-Pacific competition.