The Meteorological Agency said the typhoon is expected to bring gale-force winds and heavy rains as it directly strikes central and western Japan and possibly crosses the entire country.
It has already dumped massive rains on Kyushu, Shikoku, Kinki and Tokai, causing floods on the Shonai river flowing through Nagoya.
The agency said the typhoon will bring heavy rain to the Kanto Koshin Region including Tokyo from Wednesday afternoon and the Tohoku Region from Wednesday night to Thursday morning.
The agency forecasts rains of 400 millimeters (15.75 inches) in the Kinki, Tokai and Kanto Koshin regions, 300 millimeters (11.81 inches) in Shikoku, 250 millimeters (9.84 inches) in Chugoku and Tohoku and 200 millimeters (7.8 inches) in Hokuriku.
The U.S. Embassy has urged U.S. citizens continue to monitor local news and official information for the latest news and updates on the typhoon.