The latest Japanese Defense Ministry document, released in early August, signals that Tokyo — under the leadership of Prime Minister Sanae Takaichi — is transforming gradual military modernization into a more integrated, aggressive, and far-reaching national security architecture. This move is fundamentally changing the strategic landscape along China’s eastern periphery, through a system designed not only to absorb attacks but to deliver long-range strikes far from Japanese territory.
The white paper describes the security environment as the most severe and complex since the end of World War II. Key threats include Chinese military activities near Japanese waters, the Taiwan issue, North Korea's nuclear and missile programs, and increasingly close military cooperation between Beijing, Moscow, and Pyongyang.
To respond to these challenges, Tokyo is implementing a deep review of three basic security documents — the National Security Strategy, the National Defense Strategy, and the Defense Construction Program.
One of the most important institutional steps is the creation on July 31 of the National Intelligence Bureau. Replacing and improving the former Cabinet Office of Intelligence and Research, the new bureau consolidates information from all government agencies. With about 700 employees, it will act as the secretariat of the National Intelligence Council chaired by the prime minister herself, serving as a central “control tower” for Japan’s fragmented intelligence.
This structure is accompanied by the expansion of satellite and maritime surveillance, the strengthening of cyber and electromagnetic capabilities, as well as the integration of diplomatic, economic and technological instruments in the function of defense. Meanwhile, the adoption of anti-espionage legislation and the possible creation of an agency dedicated to foreign intelligence are still under discussion.
The Japanese military is undergoing a historic shift in its traditionally defensive doctrine (Senshu Boei). De jure, Tokyo claims that the defensive principle is maintained, but de facto it is acquiring and developing weapons that allow it to strike threats before they reach its territory.
In addition to purchasing Tomahawk cruise missiles, the military is improving its indigenous weapons of resistance, notably the Type-25 anti-ship missile. At the same time, it is accelerating the development of hypersonic weapons and unmanned vehicles (sea, air, and underwater) integrated into the SHIELD (Synchronized, Hybrid, Integrated, and Enhanced Coastal Defense) concept.
This greatly complicates military calculations along the first island chain and around Taiwan, as Japanese territory is turning from a defensive zone into an operational platform for long-range attacks.
The military buildup is accompanied by massive financial support. Japan has accelerated its defense spending target to 2% of GDP. For fiscal year 2026, the defense budget exceeded 9 trillion yen (about $56.5 billion) for the first time.
Furthermore, the revision of the Three Principles on the Transfer of Defense Equipment and Technology eases historical restrictions on arms exports. This paves the way for joint military production and supply chain integration with the US and regional allies such as Australia, the Philippines, and South Korea.
Officially, Japan adheres to the Three Non-Nuclear Principles (not possessing, not producing, and not allowing nuclear weapons on its territory). This was confirmed by Prime Minister Takaichi during the commemorative ceremonies marking the 81st anniversary of the atomic bombings of Hiroshima and Nagasaki.
However, its wording has left room for strategic ambiguity, with no guarantee that these principles will remain intact in new security documents. Experts are particularly discussing lifting the ban on the introduction of allied nuclear weapons into Japanese territory. Japan’s advanced civilian nuclear industry and plutonium stockpile give the country a “latent nuclear capability,” meaning Tokyo could arm itself much more quickly than most other states if it decided to do so.
China is watching this transformation with great concern. Official Beijing has condemned Tokyo's new approach, calling it a "dangerous turn toward remilitarization" and has increased naval and air patrols around the disputed islands.
Although Japan remains smaller than China in population and military spending, its close integration with the US-led security network and advanced technology make it a highly decisive military factor. The new Japan is no longer simply a limited postwar naval power, but a key player redrawing the security map in East Asia.
