He clung to a tree for hours to escape death in Japan's worst natural disaster. Ten years on, he's still rebuilding his life

Kenichi Kurosawa clung precariously to a tree as the water rose around him, entirely flooding the roads below.

For almost six minutes on March 11, 2011, a 9.1 magnitude earthquake -- the worst to ever hit Japan -- struck 370 kilometers (230 miles) northeast of Tokyo, triggering a huge tsunami that crashed into Ishinomaki, the coastal city Kurosawa had lived in his whole life. Minutes before waves up to 10 meters (nearly 30 feet) high swept in, Kurosawa, then aged 40, had scrambled 3 meters (10 feet) up a pine tree, wrapped his legs around a branch and hung on for his life.