The JP government will regret its strict anti-Yakuza stance and the slow demise of that traditional criminal subculture. They void left will be filled by lawless gangs and more secretive groups that won’t abide to the rigid rules of Japanese society and thus will be less controllable. The Yakuza was an open book. They weren’t a secret society like the Triads or the Mafia in the west. The government had the right to access to their membership files at any given moment. It wasn’t difficult to spot them and track their ranking. Not to mention their adherence to Japanese strict gun laws.