“The brawl that took place on the evening of the 16th at a restaurant on the 58th floor of the high-rise building “Sunshine 60” in Ikebukuro, Tokyo, was for the “celebration of release from prison” by members of the quasi-criminal group “Chinese Dragon”. Interviews with investigative officials revealed what happened at the place where they gathered.”
Google translate.
Yakuza types.
https://news.yahoo.co.jp/articles/5a9badab4d7178c208588da6d729fa3fb0eecb75
As I thought, written earlier . “ Japanese Yakuza I’m sure . “