Bridges collapsed and rivers burst their banks as heavy rain lashed northern Japan on Thursday, with 200,000 residents urged to evacuate as authorities warned of dangerous flooding.

TV footage showed a muddy mass of broken trees swept into a mountainous residential area by the downpours, which broke records in some areas.

Authorities have warned of an increased risk of landslides and floods.

Public broadcaster NHK said non-compulsory evacuation advisories were issued to 200,000 residents in five regions: Niigata, Yamagata, Fukushima, Ishikawa and Fukui.

Other TV footage showed homes flooded by an overflowing river and another muddy waterway reaching the height of a bridge.

Some shinkansen bullet trains were suspended in the affected areas.

Scientists say climate change is intensifying the risk of heavy rain in Japan and elsewhere, because a warmer atmosphere holds more water.

And in 2018, floods and landslides killed more than 200 people in western Japan during the country's annual rainy season.