nhk world mitsuko nishikawa reports. >> reporter: this is the sometimes brutal reality of japan's rainy season, towns and villages littered with torn up trees and vegetation, twisted train tracks, and streets that look like swampy, muddy messes. the last time this 72-year-old resident faced a cleanup like this was 25 years ago. >> translator: we have to get this mud out quickly. otherwise, it will get sticky and then harden. >> reporter: the rain started coming down around dawn in most places, and it came down hard, pelting the ground and lashing buildings. people woke to find usually calm rivers have turned into warring torrents. crews tried to keep the water at bay, but in some areas they just couldn't. rivers swamped neighborhoods. and rescuers had to go in with boats to whisk away residents. in some cases, they had to drop down from the sky to save people. whenever people got a break in the rain, they started cleaning up. families scooped water and mud out of their living rooms. and crews attacked piles of rubble. this is what it looked like when employees of this cell phone company