Japanese are dumb.
There are always background cases of cancer in population. Cancer always exists. But now if someone in Japan will get cancer, they can scapegoat it to Fukushima and this leakage. Not just in Japan, in the whole region - if some philippino gets a cancer, he can say "Fugg, maybe it was just Japanese fish!"
No matter how Japanese will try to sugarcoat it, people will always blame Japan now for cancer cases. Stupid incompetent Japanese. Can't build storage for water. China would probably construct a giant storage of water that would last it 100 years. something enormous. but Japanese like "Lets just spill it in the water around us!"