The Yakuza, weirdly, operate semi-publicly so their headquarters, hierarchies, and membership numbers are well known. In the early 90s there were close to 100,

The Yakuza, weirdly, operate semi-publicly so their headquarters, hierarchies, and membership numbers are well known. In the early 90s there were close to 100,000 members, now there's probably under 20k. https://www.nippon.com/en/japan-data/h01383/ https://www.nippon.com/en/japan-data/h01383/