Thousands of people are expected to form a "human chain" around Japan's parliament on Sunday as part of demonstrations aimed at ending nuclear power after last year's atomic crisis at Fukushima.
The protest is the latest in a string in Japan, which has seen a rising tide of anti-nuclear sentiment since Prime Minister Yoshihiko Noda in June ordered the restart of two reactors.
Noda defended the move citing looming power shortages after Japan switched off its 50 nuclear reactors - which once supplied one-third of resource-poor Japan's energy - in the wake of Fukushima.
Weekly demonstrations outside the prime minister's residence have drawn tens of thousands of people and a rally in west Tokyo earlier this month saw a crowd that organisers claimed was about 170,000.
The Sunday demonstrations, scheduled to start about 3:00 pm (0600 GMT), will see a march through the capital before protesters form a human chain around the legislature in the evening to demand a "swift abolition of nuclear power".
Protest organizer Kaori Echigo said demonstrators from across the nation of 127 million were expected to descend on Tokyo for the march.
"Not only people from Tokyo but also people from Hokkaido (in the north), Nagano (in central Japan) and Osaka are expected to come by bus," Echigo told AFP.
The latest rally comes less than a week after a damning government-backed report on last year's crisis said Japanese officials and Tokyo Electric Power (TEPCO), operator of the crippled Fukushima plant, ignored the risk of an atomic accident because they believed in the "myth of nuclear safety".
A separate parliamentary report said the worst nuclear accident in a generation was a man-made disaster, marked by a lack of oversight and collusion between TEPCO, the government and regulators.
The giant utility largely cleared itself of blame, saying the size of last year's earthquake and tsunami was beyond all expectations and could not have reasonably been foreseen.
A 9.0-magnitude earthquake and tsunami on March 11, 2011 crippled cooling equipment at the Fukushima Daiichi plant, triggering meltdowns that spewed radioactivity and forced tens of thousands of residents to flee.
[image via Agence France-Presse]