10 December 2025

Japan Has Changed How the World Must Think About Taiwan

Mr. Singleton 

A single word can crack the facade of a great power’s confidence.

That’s what happened last month when Prime Minister Sanae Takaichi of Japan told lawmakers in Tokyo that a Chinese attack or blockade against Taiwan would constitute a threat to Japan’s “survival,” a term that, under Japanese law, would permit the country to deploy its military overseas.

Ms. Takaichi merely said aloud what has long been understood — that a crisis involving Taiwan would threaten Japan’s national security. But her comments were among the clearest public signals yet that Tokyo could help defend Taiwan from potential Chinese aggression.

Beijing reacted as if Ms. Takaichi, a conservative politician, had declared war. Chinese state media has portrayed her as reviving the militarist rhetoric used to justify Japan’s aggression during World War II, and a senior Chinese envoy posted what amounted to an online threat to behead Ms. Takaichi. China has halted some Japanese imports, discouraged Chinese tourism to Japan and stepped up coast guard patrols around islands claimed by both countries.

Beijing routinely lashes out at Tokyo because of lingering resentment over Japan’s wartime past, which included a brutal invasion and occupation of China. This time, however, the fury is rooted in something more dangerous: China’s growing anxiety that one of its bedrock goals — isolating Taiwan and forcing it to submit to unification on Chinese terms — is slipping away.

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