Japan underestimated the risk of a tsunami hitting its nuclear power plants, but its response to the crisis that followed the earthquake in March was exemplary, the UN nuclear energy agency says.
The Fukushima Daiichi nuclear plant, which was badly damaged by the tsunami that followed the 11 March quake, is still leaking radiation.
Inspectors from the International Atomic Energy Agency (IAEA) spent a week in Japan compiling their report on the Fukushima nuclear crisis, and have given a summary to the Japanese government.
The team was led by Britain's top nuclear safety official, Mike Weightman, and included experts from France, Russia, China and the United States.
The full report, intended to improve nuclear safety around the world, will be submitted at an inter-governmental meeting in Vienna later this month.