Japanese weather officials have warned that torrential rains will hit swathes of central and eastern Japan, including Tokyo, on Tuesday.
The Meteorological Agency says unstable atmospheric conditions and warm, humid air have led to rain cloud formations. Heavy rain warnings were focused on the Tokai and Kanto-Koshin regions.
The agency says on Tuesday morning, hourly rainfall of 66 millimeters was recorded in Shizuoka City, located on the Pacific coast in the Tokai region.
In some parts of Shizuoka Prefecture, more than 300 millimeters of rain fell in 24 hours, prompting officials to issue a landslide warning.
The agency says the Tokai and Kanto-Koshin regions will most likely experience hourly rainfall of at least 50 millimeters, as the front moves across Japan from west to east.
Up to 180 millimeters of rain will likely fall during the 24 hours leading up to Wednesday morning in some parts of Tokai, Kanto-Koshin and Izu Islands.
The Pacific coast in eastern and northern Japan will also experience gusty winds and rough seas, with waves as high as 6 meters.
The Meteorological Agency has warned that there may be landslides, swelling rivers, flooding in low-lying areas, high surf, lightning strikes and tornados.