The Ministry of Defence in Tokyo has fired a warning shot across Beijing’s bows. Japan’s defence minister, Minoru Kihara, today publicly rebuked China’s “huge arsenal” of military hardware and dismissed accusations that Tokyo is sliding back toward militarism. The blunt language, notably delivered during a joint press conference with his British counterpart, signals a hardening of Japan’s strategic posture. And it’s a posture the UK is now explicitly endorsing.
Kihara’s remarks were a direct response to China’s repeated claims that Japan is “breaking its pacifist shackles.” Nonsense, said Kihara. “Japan has always adhered to a purely defensive defence policy. It is China that is rapidly expanding its huge arsenal and acting assertively in the region.” He pointed to Beijing’s double-digit defence budget increases and territorial claims in the East China Sea as the real source of instability.
The British Defence Secretary, who stood beside Kihara, offered no qualifiers. The UK supports Japan’s right to self-defence and its deterrent capabilities, he said. It’s a clear message to China: London is no longer sitting on the fence in the Indo-Pacific. This is the second time in as many months that British and Japanese defence chiefs have met to discuss interoperability, intelligence sharing, and joint exercises.
Behind the scenes, Whitehall sources indicate this is part of a quiet push to deepen the UK-Japan relationship beyond trade. The 2023 Reciprocal Access Agreement was just the start. Now, officials are talking about co-development of next-generation fighter jets and maritime patrol cooperation. The subtext? Britain sees Japan as a firewall against Chinese expansion and a key partner in a post-Brexit global Britain strategy.
But there’s a domestic angle too. In Tokyo, Kihara is walking a tightrope. The opposition in the Diet has raised concerns about the new National Security Strategy, which doubles defence spending to 2% of GDP by 2027. China’s accusation of “militarism” is political poison for any Japanese government. It invokes the ghost of the 1930s. So Kihara’s pushback today was also aimed at domestic critics. He needed to frame deterrence as defensive, not aggressive.
Will it stick? The polling data in Japan shows the public is increasingly anxious about China’s military buildup. A 2024 Asahi poll found 68% support for stronger defence, a record high. So Kihara has public opinion on his side. But he also has China’s state media machine to contend with. State-run Global Times has already branded today’s joint statement a “provocation.”
The UK’s backing is not without risk. China has warned Britain against “meddling” in Asian affairs. But the British government calculates that its economic ties with the US and its security commitments in Europe are already strained. Better to have friends in the Pacific than watch from the sidelines.
The question now is whether this rhetoric will escalate into action. The UK has promised to deploy the Carrier Strike Group to the region more frequently. Japan is building up its stand-off missiles and cyber capabilities. Neither side is blinking.
For now, Kihara has drawn a line in the water. China’s arsenal is huge, he says. And Japan, with the UK’s blessing, is no longer willing to just take note. It will deter.
