1 Technically the Yakuza is legal
The main principle of the Yakuza is to stay clean before the law. It’s all part of their elaborate disguise. The headquarters of the Yakuza is located on one of the business districts of Tokyo and the official activities are not beyond the law. The actual muscle work is typically carried out by people who are unaffiliated with the Yakuza and the legal purity provide the best lawyers of Japan, thereby the actual gang members keep their hands clean.
2 Their tattoos are done by hand