As much as 10.6 inches of snow was recorded in Tokyo by late yesterday, the heaviest fall in the capital for 45 years, according to meteorologists.
The storm hit Tokyo on the eve of its gubernatorial election.
Observers say the weather may affect voter turnout in the city of 13 million people. As of 6 PM (0900 GMT) turnout was down more than 10 percentage points from a previous poll during the last mayoral election.
Local media said at least 11 people have been killed with one person also in critical condition in snow-linked accidents- mostly crashes after their cars skidded on icy roads.
In central Aichi prefecture, a 50-year-old man died after his car slipped on the icy road and rammed into an advertisement steel pole, a local rescuer said.
Public broadcaster NHK reported at least 1,253 people were injured across the nation, many of whom had slipped on the ground or fallen while shovelling the snow off their roofs.
Nearly 5,000 people were stranded at Narita airport yesterday as traffic linking the airport to the capital was disrupted, NHK said.
Further snowfall is expected today in the northern part of the country, the Japan Meteorological Agency said.
