Two Chinese coastguard ships sailed into disputed waters off Japan-administered islands in the East China Sea Saturday, officials said, as the United States warned Beijing over increasing territorial assertiveness.
China's declaration of an air defence identification zone that includes disputed islands is "profoundly dangerous", Japan's prime minister said Monday, as South Korea weighed into the war of words against Beijing.
Four Chinese coastguard ships sailed through disputed waters off Tokyo-controlled islands in the East China Sea Saturday, officials said, as Japan continued a massive drill aimed at bolstering defence of its remote islands.