Protracted Ukraine War and the Far East Shift: Japan'

📡 THE SIGNAL — What Happened

Why it matters: As Russia re-strengthens its military presence in the Far East due to the stalemate on the Ukrainian front, Japan stands at a historic turning point, simultaneously facing a triple risk concerning the Northern Territories, energy, and defense.

• Military Trends — The Russia-Ukraine War has entered its fourth year since the full-scale invasion in February 2022, with no prospect of a ceasefire as of March 2026.
• Military Trends — The Ministry of Defense analyzes that the Russian military has increased the frequency of exercises in the Far Eastern Military District (reorganized from the Eastern Military District), with naval vessel and aircraft activities around the Northern Territories increasing by approximately 30% compared to 2025.
• Diplomacy — Japan-Russia relations have been virtually frozen since 2022, with peace treaty negotiations completely suspended. Russia continues to designate Japan on its "unfriendly countries" list.
• Sanctions — Since 2022, Japan has, in coordination with the G7, implemented a cumulative 12 packages of economic sanctions against Russia. These include export restrictions on semiconductors and machine tools, exclusion of financial institutions from SWIFT, and freezing of individual assets.
• Energy — The maintenance of Japanese companies' interests in the Sakhalin-1 and Sakhalin-2 projects has become a political issue. A structure where approximately 9% of LNG procurement depends on Russian sources remains.
• Defense Policy — Japan's defense budget for FY22026 has reached approximately 8 trillion yen, exceeding 1.5% of GDP. The development of counter-strike capabilities (stand-off defense capabilities) is accelerating.
• Public Opinion — "#SecurityPolicyReview" and "#NorthernTerritories" have trended on social media. While public opinion polls show majority support for strengthening defense capabilities, calls for diplomatic solutions also remain strong.
• International Cooperation — In addition to deepening the Japan-U.S. alliance, "quasi-alliance" relationships such as Japan-Australia, Japan-UK, and Japan-Philippines are expanding. Institutionalization of cooperation with NATO is also progressing.
• Economic Impact — As a side effect of sanctions against Russia, Japan's energy procurement costs have risen by approximately 40% compared to pre-war levels. The synergistic effect with the weak yen has solidified a trade deficit structure.
• China Factor — Amid strengthening military cooperation between China and Russia, Japan is compelled to build a defense posture conscious of a "two-front" risk.
• Technology — Japanese intelligence agencies are wary of the possibility that drone and ballistic missile technology procured by Russia from North Korea and Iran could be deployed in the Far East.
• Domestic Politics — Since the 2025 House of Councillors election, both ruling and opposition parties are converging towards strengthening security policy, but the balance between the degree of sanctions reinforcement and maintaining diplomatic channels remains a point of contention.

To understand the phenomenon of the prolonged Ukraine War and Russia's shift to the Far East fundamentally altering Japan's security environment, it is necessary to look back at the changes in Japan-Russia relations and the East Asian security order since the end of the Cold War.

Following the collapse of the Soviet Union in 1991, Japan sought to normalize relations with Russia, making the resolution of the Northern Territories issue and the conclusion of a peace treaty one of its most important diplomatic priorities. Successive administrations, through the 1993 Tokyo Declaration, the 1997 Krasnoyarsk Agreement, and the 2001 Irkutsk Statement, maintained the basic policy of "resolving the issue of the four islands' sovereignty and concluding a peace treaty" while continuing dialogue. Particularly during the Abe administration (2012-2020), efforts were made to improve relations through 27 summit meetings with President Putin, and the concept of joint economic activities was also proposed as a "new approach."

However, these diplomatic efforts suffered their first major blow with the annexation of Crimea in 2014. As a member of the G7, Japan was compelled to participate in sanctions against Russia, but maintained a more restrained stance compared to other G7 nations, striving to preserve dialogue channels. This was a diplomatic maneuver aimed at resolving the Northern Territories issue, as well as a pragmatic decision to maintain relations with Russia for energy security.

The full-scale invasion of Ukraine in February 2022 completely shattered this cautious balancing diplomacy. From a stance of resolutely rejecting "unilateral changes to the status quo by force," Japan embarked on large-scale sanctions in lockstep with the U.S. and Europe. The Kishida administration (at the time) positioned the Ukraine issue as "a problem directly linked to East Asian security," popularizing the notion that "today's Ukraine could be tomorrow's East Asia." This shift in perception became a catalyst for fundamentally changing Japan's security policy.

The Three Security Documents (National Security Strategy, National Defense Strategy, Defense Buildup Program) approved by the Cabinet in December 2022 marked one of the largest shifts in Japan's post-war security policy. Policies previously considered taboo, such as the target of 2% of GDP for defense spending, the possession of counter-strike capabilities, and the strengthening of cyber and space domains, rapidly moved towards realization. While the direct trigger for this shift was the Ukraine War, the background included a triple threat perception: China's military rise, the acceleration of North Korea's nuclear and missile development, and Russia's unpredictable actions.

As of 2026, the stalemate in the war is not merely solidifying the status quo but leading to a structural reorganization. Russia has completed its transition to a wartime economy, with its economy revolving around the military-industrial complex, and has mobilized troops and equipment from across Russia, including the Far East, to compensate for attrition on the Western front. However, since the latter half of 2025, as the front-line stalemate has become entrenched, there are signs that Russia has begun to "rebuild" its military presence in the Far East. This is not merely about replenishing forces but has multi-layered intentions: reasserting strategic superiority in the Far East, deepening military cooperation with China, and simultaneously maintaining a deterrent against the Japan-U.S. alliance.

In terms of energy, while Japan has been working to reduce its dependence on Russia, a complete replacement for Sakhalin LNG has not been achieved. Measures such as a renewed increase in Middle East dependency, diversification of procurement from Australia and Canada, and expansion of renewable energy are underway, but increased costs during the transition period are unavoidable. Furthermore, as Russia expands its energy exports to China and India, the structure of the global energy market itself is changing, placing Japan in a position where it must secure alternative supply sources at higher costs.

Public opinion within Japan has also shifted significantly. Even among segments of the population where interest in security issues was relatively low before 2022, the shock of the Ukraine War spread the realization that "peace is not automatically maintained." Public support for strengthening defense capabilities is at a historically high level, politically bolstering the shift in security policy. However, concerns about the economic costs brought by strengthened sanctions (such as rising energy prices and fishing rights issues) remain strong, making the balance between diplomacy and sanctions a continuing policy challenge.

The delta: The stalemate in the Ukraine War and Russia's commencement of rebuilding its military presence in the Far East are irreversibly transforming Japan's security environment from a "China-centric" focus to a "China + Russia" two-front structure. This is a structural change that impacts defense spending, diplomatic policy, and energy policy.