Activists who have been rallying against nuclear power near the prime minister's office and the Diet building since 2012 are scheduled to hold their 100th demonstration Friday night.
The number of people attending the rallies, however, has declined to several thousand after peaking at some 200,000.
Misao Redwolf, an illustrator and one of the rally organizers, said she will continue to hold the rally every Friday night. "It's important to raise voices against nuclear power," she said. "We will continue protesting because we have no reason to quit."