A team of international experts has started its week-long assessment of the clean-up process at Japan's crippled Fukushima nuclear plant.
The 16-member group from the International Atomic Energy Agency will inspect the remediation of radioactive contamination at the site and advise the Japanese government on ways to better manage the crisis.
A report based on their study will also be released.
The first IAEA visit to Fukushima in two years comes as Tokyo continues to come under international criticism for its sluggish response to the nuclear contamination.
In July, plant operator TEPCO admitted highly radioactive water has been seeping into the Pacific Ocean since soon after the March 2011 quake and tsunami.