nationwide pro-democracy movement

An internationally acclaimed Japanese novelist has offered words of encouragement to pro-democracy protesters in Hong Kong. 

pro-democracy demonstrator
民主化運動の活動家

pro-democracy group
民主主義擁護団体

pro-democracy leader
民主化運動指導者

pro-democracy movement
民主化要求運動、民主化勢力

nationwide pro-democracy movement
全国規模の民主化運動