Yeah, but they mainly just do pachinko. They own basically every pachinko parlor in japan.
Sure they do some other stuff too, but it's not a big deal. Banks and other corporations are much worse than mobsters.
Mobsters in America will lend you money and maybe beat you if you don't pay it back, but they will never kill you or take your house. Same with all mobsters. They do illegal things, but only because they don't have government backing like some of the worst industries do: insurance, banking, Debt Collectors, etc etc. Those industries literally strangle people whereas yakuza and other mobs don't. They just want their money and don't want to make enemies.
Japanese people though are just unnaturally scared of Yakuza. Japan has one of the lowest crimerates and homicide rates in the world.
