Japan Accelerates Military Buildup Amid Regional Tensions with China

Japan is significantly enhancing its military capabilities in response to escalating threats from China, planning to double its annual arms spending. The new strategy aligns with increasing calls from the United States for enhanced military collaboration in Asia, particularly as Japan’s leadership shifts toward more hawkish and ultra-conservative stances under Prime Minister Sanae Takaichi. While Japan maintains that it remains a peaceful nation, the military buildup raises concerns about its adherence to postwar pacifism.

Japan’s constitution, established after World War II, has long been a cornerstone of its pacifist stance. Under Article 9 of the 1947 constitution, Japan renounced the use of force in international disputes and was not supposed to maintain military forces. However, the landscape changed during the Korean War in 1950, leading to the formation of the Japanese Self-Defense Forces in 1954. Over the years, Japan has gradually expanded its interpretation of self-defense, allowing for overseas troop deployments mainly for peacekeeping.

A significant pivot occurred in 2014 under former Prime Minister Shinzo Abe, who reinterpreted Article 9 to permit collective defense. This shift allowed Japan to engage militarily if allies, including the United States, faced attacks. Takaichi’s recent remarks suggesting potential military responses to any Chinese aggression towards Taiwan have drawn sharp criticism from Beijing, which views such statements as a departure from Japan’s historical commitment to peace.

Escalating Regional Tensions

Tensions between Japan and China have intensified, particularly following incidents involving Chinese military maneuvers near Japan. In December, Chinese aircraft reportedly locked their radars onto Japanese planes, raising alarms in Tokyo. This incident followed the sighting of two Chinese aircraft carriers operating near the southern Japanese island of Iwo Jima, marking an unprecedented display of military activity in the region.

In response, Takaichi’s Cabinet has approved a record defense budget exceeding 9 trillion yen (approximately $58 billion) for the upcoming fiscal year. This budget aims to enhance Japan’s strike-back capabilities with investments in cruise missiles and unmanned military assets. The Chinese Foreign Ministry responded to Japan’s military expansion by stating, “Japan is deviating from the path of peaceful development it has long claimed to uphold and is moving further and further in a dangerous direction.”

Japan’s historical context plays a crucial role in shaping these developments. Takaichi’s past visits to the Yasukuni Shrine, which honors Japan’s war dead, have caused distress among nations affected by Japanese wartime actions. Although she refrained from visiting the shrine in 2025, her earlier associations have led some to perceive her government as a proponent of Japan’s militaristic past.

Future Military Direction

The fundamental shift in Japan’s military policy became pronounced in December 2022 when the government under former Prime Minister Fumio Kishida adopted a new security strategy asserting the necessity for long-range missiles and strike-back capabilities. This strategy identifies China as Japan’s primary strategic challenge and marks a departure from the nation’s traditional self-defense posture.

Economic considerations have historically influenced Japan’s defense policies, with Japan maintaining a defense spending cap of 1% of GDP until recent years. Under Abe’s leadership, defense spending increased to about 1.1%. Takaichi is set to achieve a target of 2% by March 2024, two years ahead of schedule, reflecting the growing pressure on Japan to align with NATO’s new spending goals.

Amid these changes, Takaichi’s defense policy envisions further advancements in unmanned combat technologies and long-range missile capabilities. The government is expected to lift remaining restrictions on arms exports, signaling a push to develop Japan’s defense industry and collaborate with allied nations. Japan has begun projects such as developing next-generation fighter jets with the United Kingdom and Italy, alongside a deal to sell frigates to Australia.

Additionally, discussions are underway about the potential development of nuclear submarines, a controversial notion given Japan’s longstanding non-nuclear principles. While Japan officially adheres to its three non-nuclear principles of not possessing, producing, or allowing nuclear weapons, Defense Minister Shinjiro Koizumi indicated that all options are being considered.

As Japan navigates this critical juncture in its military evolution, its actions will be closely scrutinized both regionally and globally. The balance between maintaining its pacifist constitution and addressing security threats will determine the future trajectory of Japan’s defense policies and its role on the international stage.