Tens of thousands of people have rallied in Tokyo to demand an end to nuclear power.
AFP reports organisers say the number of participants is estimated to reach 170,000, making it one of the biggest anti-nuclear rallies since last year's nuclear disaster.
It is the latest in a series of anti-nuclear rallies following the tsunami-sparked disaster at Fukushima last year.
It comes after a nuclear reactor in western Japan began full operations last week, the first restart since the country shut down its atomic stations last year.
A parliamentary report said last year's accident at the Fukushima plant was a man-made disaster, marked by a lack of oversight and collusion between the plant operators, government and regulators.