Japan on Monday will switch on a radar station in the East China Sea, giving it a permanent intelligence gathering post close to Taiwan and a group of disputed islands claimed by both Tokyo and Beijing. The new Self Defense Force base on Yonaguni is at the western extreme of a string of Japanese islands in the East China Sea, 150 km (93 miles) south of the disputed islands known as the Senkaku islands in Japan and the Diaoyu in China. “This radar station is going to irritate China,” said Nozomu Yoshitomi, a professor at Nihon University and a former...