 A tropical depression developed on August 2 southeast of Guam , and gradually intensified while moving to the northwest , becoming a tropical storm on August 3 and a typhoon a day later . <unk> formed an eye and became a large storm by the time it approached Okinawa on August 7 . The typhoon attained peak winds of 155 km / h ( 100 mph ) before weakening slightly while turning to the northeast . <unk> made landfall on the Japanese island of <unk> on August 8 , and later moved across portions of <unk> and <unk> . After weakening to tropical storm status , the cyclone became extratropical on August 9 and dissipated three days later . 
