The roar of the Japanese f-35 fighter jets above Misawa, in northern Japan, is formidable. At the base, which houses Japanese and American forces, pilots from the two countries practise flying together. ⇒ The risk of war with China over Taiwan has made those preparations ever more urgent. Japan plans to raise its defence budget by two-thirds by 2027 and acquire long-range missiles to make its Self-Defence Forces (sdf) fiercer. But it has not fired a shot in battle since 1945. Will Japan fight? Geography puts Japan on the front line: its westernmost island sits 111km from Taiwan. Conflict is probably less likely if China believes Japan would join the fray. If war does break out, keeping Taiwan from falling may hinge on Japanese support and firepower. At a minimum, America would need to use its bases in Japan. And if Japan’s forces engaged in combat, success would be far more likely. If a crisis around Taiwan were to occur, “there’s no way Japan won’t be involved,” says a lawmaker w...