The Yakuza are routinely depicted as being armed with, and using, guns. In reality, the Yakuza, and other Japanese criminals, almost never use guns (Japan averages fewer than ten gun homicides nationwide in most years). The incredibly strict gun laws in Japan mean that it's just not worth it for even professional criminals like the Yakuza to use firearms. Even possessing an illegal gun, without a link to any other crime, can lead to a hefty prison sentence.
However, it's been stated that "Japanese criminals, almost never use guns", which means that it does sometimes happen. The film depicts a time when it happens.
