Japanese weather officials are warning that people should be on alert for heavy snowfall expected from Monday afternoon to Tuesday in the Kanto-Koshin region.
The Meteorological Agency says a developing low-pressure system is forecast to move east along the southern coast of the main island of Honshu. It is expected to bring heavy snow to mountains and mountainous areas in the Kanto-Koshin region, which encompasses Tokyo and central Japan.
Snow is also expected to accumulate on flatlands, including Tokyo's 23 wards.
Up to 30 centimeters of snow is expected in the Koshin region and in the mountains in the northern Kanto region, and up to 20 centimeters on flatlands in northern Kanto as well as the Hakone, Tama and Chichibu regions during the 24 hours through Tuesday morning.
Up to seven centimeters of snow is forecast in flatlands in the southern Kanto region and up to five centimeters in Tokyo's 23 wards during the same period.
The agency says if temperatures are lower than expected, alert-level snowfall may hit low-lying areas, including Tokyo's 23 wards.
Officials are advising people to be on alert for traffic disruptions caused by snow and icy roads. They are also urging caution for snow on power lines and trees, collapsing greenhouses and avalanches.
They are urging people to work from home or return home earlier than usual if they need to go out. Drivers are advised to be prepared for heavy snow and not to drive cars that are not equipped with winter tires.
They are advising passengers to keep updated with the latest information on the weather and train services.