One person has been reported dead as record rains batter southwestern Japan for a second day, with flooded rivers forcing 400,000 from their homes.  

Residents have recounted horror stories of family members being swept away by the waters, or trees tearing through walls of their residences. 

The government rushing to send aid, with hundreds of rescuers mobilized to help with evacuations.

That includes police, firefighters and soldiers.

50 helicopters are also on standby.

"There is still chance of more torrential rain. I urge everyone in Japan to pay attention to weather information updates from radio and television broadcasts," said Japan's Chief Cabinet Secretary.