Typhoon Faxai made landfall near Tokyo because of which more than 900,000 homes are without power.
With winds of up to 210km/h (130mph), Faxai is one of the strongest typhoons to hit the Japanese capital in a decade.
More than 130 flights were cancelled and train lines closed for hours, disrupting the morning commute.
On Monday morning, Japan's national broadcaster NHK said that power cuts hit 910,000 people in the Tokyo area.
The entire city of Kanagawa lost power at one stage, and authorities warned against going outside.