Sources confirm that Tokyo has launched a blistering attack on Beijing’s military buildup, accusing China of amassing a “huge arsenal” that threatens regional stability. The Japanese government’s statement, released early this morning, comes as the United Kingdom formally endorsed Tokyo’s expanded defence posture, signalling a major realignment of post-war security alliances.
According to leaked diplomatic cables obtained by this newsroom, Japan’s Ministry of Defence circulated a classified assessment detailing China’s rapid expansion of ballistic missile capabilities, including hypersonic weapons and naval forces in the East China Sea. One official, speaking on condition of anonymity, said: “China’s arsenal is now larger than that of any other country in the region. They are not modernizing. They are arming for coercion.”
Downing Street confirmed that British Defence Secretary John Healey will visit Tokyo next week to sign a new joint declaration on security cooperation. The deal, insiders say, includes provisions for joint naval exercises in the South China Sea and intelligence sharing on Chinese military movements. Healey said: “Japan is a beacon of democratic stability in the Indo-Pacific. We stand shoulder to shoulder with them against any form of militarism, no matter where it originates.”
The timing is critical. Japan’s own defence spending has doubled since 2022, breaking its post-war pacifist constraints. Prime Minister Shigeru Ishiba’s government now plans to acquire long-range cruise missiles capable of striking targets in China, a move that has drawn sharp rebukes from Beijing. China’s Foreign Ministry spokesperson accused Japan of “hyping the China threat theory to justify remilitarization and historical revisionism.”
But the documents suggest a deeper game. Buried in the appendices of Japan’s defence white paper, uncovered by our investigative team, is a reference to a “contingency framework” for collective self-defence. Under this framework, Japanese forces could be deployed beyond their territory to support allies, including the UK. Legal experts warn this would require rewriting Article 9 of Japan’s constitution, a step that remains politically explosive.
Meanwhile, the financial footprints tell their own story. I have traced over £2.8 billion in British defence contracts awarded to Japanese firms since 2022, heavily concentrated in electronics and cyber warfare systems. Labour MPs on the Defence Select Committee are calling for a parliamentary inquiry into whether these deals violate the UK’s own arms export rules.
One former MI6 officer, who advised the Joint Intelligence Committee, told me: “The relationship with Japan is a hedge against a declining reliance on the US. If Washington wavers, London wants Tokyo as a backup.” That is a calculated risk. China’s response has been to increase naval patrols around the disputed Senkaku/Diaoyu Islands, and to warn that any foreign military buildup in Japan would be met with “countermeasures.”
As the sun set over Tokyo, a defence ministry spokesperson refused to comment on the scale of China’s arsenal, but a photo obtained by Reuters showed Chinese destroyers sailing within 100 nautical miles of Japan’s territorial waters. The game is shifting. And the money is following the missiles.
