Nationwide anti-Japanese demonstrations have erupted in China periodically in recent years. This study investigates what factors make university students more motivated to participate in anti-Japanese demonstrations. We collected original data on 1,458 university students in Beijing in June 2014, inquiring about both actual and possible future participation. We find that students are more willing to participate in future demonstrations (1) when they believe that anti-Japanese demonstrations benefit China's diplomacy (instrumentality), and (2) when they have prior demonstrators in their social networks (diffusion). However, when it comes to actual participation, only diffusion plays a significant role while instrumentality does not. While students claim that they are motivated by beliefs that demonstrations will matter for China's diplomacy, they actually turn out only when networks operate. In addition, membership in the Chinese Communist Party (CCP) does not affect prospective participation but deters actual participation. The CCP actually discourages participation in recent anti-Japanese demonstrations.