I'm not an expert on the topic; just a Tokyo resident. But it seems clear to me that there are advantages to this stance, too, which you may not be considering.

I'm not an expert on the topic; just a Tokyo resident. But it seems clear to me that there are advantages to this stance, too, which you may not be considering. It's not possible to eliminate organized crime entirely. Not anywhere, unless you go full police-state with cameras inside every home and business. (And probably not even then.) So keeping it semi-open and well-known makes it more manageable. It's a tradeoff. One reason we don't have much collateral violence from organized crime here, I think.