My pal Brent Fujioka recently sent me a hot tip. There are currently significant anti-racist demonstrations being held in Tokyo to oppose the so-called Zaitokukai, an anti-Korean hate group. Information about the demonstrations can be found here and here. The group claiming affiliation with the demos is calling itself "Shit Back Crew," and there's little or no information on them here at their tumblr:
It's strange that they feel compelled to cover their faces, but otherwise this is really encouraging and interesting. Anyone who has further information, it would be appreciated.