At 8 a.m. today, Walaka was located about 300 miles southwest of French Frigate Shoals and 705 miles west of Honolulu and was packing maximum sustained winds of 140 mph while moving north-northeast at 22 mph, according to the Central Pacific Hurricane Center.
The current trajectory of Kong-rey will see it move from Okinawa in a northward direction toward the Korean Peninsula, the JMA said, before reaching coastal areas of the Sea of Japan.
Waves have been reported surging over 22 feet as the swirling storm system tracks across the ocean.
Kong-rey is now packing wind speeds of 69mph with higher gusts of 86mph. It will arrive about a week after Typhoon Trami traversed the archipelago.
In late August, Typhoon Soulik hit the country, leaving one person missing and two others injured.
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It is feared the typhoon will bring heavy rain to northern Kyushu on Saturday and possibly to eastern and northern Japan toward Sunday, depending on its course, according to the agency.
With winds of up to 134mph, roofs were torn from structures, trucks overturned and a 2,500-tonne tanker was pushed into the bridge to Kansai International Airport.
The weather agency warned of strong winds, lightning strikes and heavy downpours.
Japan's capital Tokyo will avoid the brunt of the storm but could feel the effect of winds later this weekend.