Huh interesting. I overheard a conversation in a bar around Kabukicho, Shinjuku, Tokyo a few years ago with similar story.

The bartender was talkingto a local bar owner, and he was explaining how he was trying to find another contractor for garbage disposal because he found the current rate ridiculous. Every contractor hung up on him after hearing his address, and he found out that yakuza had territories around Kabukicho and you'd get in trouble if you took a contract there.

Interesting to hear garbage disposal being a common business organized crime go for. I guess there's many utilities too to have garbage disposal infrastructure for other illegal activities