Having done business for 30 years in Japan, all I can say is this is so non Japanese to what I recall.
Went to visit friends that have a place in Mexico and went way out into the country to a fancy outdoor restaurant in the mountains overlooking the Pacific.
Lots of young people driving expensive cars. Crowded, music, nice clothes. I’m guessing that these “kids” (20-somethings) were from families that had connections in the mob, government, and/or both.
There were 8 guards in tactical gear, face masks/balaclavas and AR style rifles around the perimeter of the outdoor seating area.