Japan on Sunday conducted a tsunami evacuation drill on its westernmost island, an exercise that could also help residents respond to an emergency arising from any attempt by China to take control of nearby self-ruled Taiwan, an official said. About 200 island officials and members of Japan's military, known as the Self-Defence Force (SDF), took part in the exercise on Yonaguni, Japan's westernmost island, 2,000 km (1,240 miles) southwest of the capital, Tokyo.