A powerful typhoon looming down on disaster-ravaged Japan has killed at least four people. Authorities said today that the bodies of four people have been found in central and western Japan, while two people are missing in Gifu prefecture. More than a million people have been warned to leave their homes over fears that the torrential rains Typhoon Roke is expected to cause widespread flooding. Auto giant Toyota said it was temporarily shutting 11 of its 15 Japanese plants, which lie in the path of the approaching storm.