Heavy rain continued to fall over vast areas of Japan on Monday, with at least four people dead and five missing due to related landslides.

The Meteorological Agency said more heavy rain is forecast for areas from western Japan to the northeastern parts of the country in the coming days, as a stationary front is expected to remain parked over the archipelago this week.

The agency said even small amounts of precipitation could trigger flooding and mudslides, as the land may have already been saturated with rain from the past few days.