As many as 170,000 people took to Tokyo's streets Monday to protest the restart of a nuclear reactor in Japan despite the nation's worst atomic disaster last year. The largest protest in decades came a week after a reactor in central Japan returned to full operation following its reactivation July 1, making it the only one of Japan's 50 reactors to be operating, according to a report of DPA. The number of participants increased nearly threefold, compared with the one held in September, because of rising fears that the government would reactivate more nuclear reactors, the citizens group Sayonara Nukes Organization, which organized both rallies, said. The group was led by Japanese intellectuals such as Nobel literature laureate Kenzaburo Oe.