Yep, this is New Year time and a few gaijin got together for a fight. One bullet – yes, just one – was fired in the altercation, with fragments of that one bullet hurting three passers-by. From the Mainichi article:
“I really can’t believe that people were attacked in the middle of Shibuya in this bright year-end atmosphere,” a 24-year-old female store employee in the area said.