A swarm of around 100 protesters dressed in black descends on Tokyo’s famed Shibuya crossing on a recent Sunday afternoon, prompting onlookers to stop and stare as a police escort expertly guides the raucous group toward the nearby neighborhood of Aoyama.

Among the protesters is William Lee, one of the most prominent Hong Kong activists in Japan, who uses a megaphone to urge everyone who can hear him to defend democracy in his place of birth.

“Stand with Hong Kong,” he pleads. “Fight for freedom.”