While China is engaged in a tense border standoff with India high in the Himalayas, a small group of islands thousands of miles away could be another military tinderbox waiting to explode.
Both Tokyo and Beijing claim the uninhabited islands, known as the Senkakus in Japan and the Diaoyus in China, as their own, but Japan has administered them since 1972.
Tensions over the rocky chain, 1,200 miles (1,900 kilometers) southwest of Tokyo,...