The Tokyo Metropolitan area is being pounded by heavy wind and rain from the powerful typhoon Faxai.
The weather agency says Faxai made landfall in Chiba City, Chiba Prefecture, east of Tokyo at about 5 a.m. Monday.
Approximately 450,000 households had electricity blackouts as of 4 a.m., according to Tokyo Electric Power Company.
The storm has also caused major disruptions to regional transportation.
East Japan Railway says it is cancelling morning services until at least 8 a.m. Other major operators, including Odakyu, Keikyu, and Keio, say they will delay their first train runs.
Both Central and East Japan Railway have suspended Shinkansen bullet train service until early Monday morning.
And at the region's airports more than 100 flights have been cancelled.
Heavy rain is expected to continue for some time. An evacuation order has been issued for 3,000 people in Kamakura, Kanagawa Prefecture.
This comes as evacuation advisories have already been issued for about 390,000 people in parts of Kanagawa, Shizuoka and Tokyo prefectures.