|Apparently this is actually the mascot of the Yamaguchi prefecture PD...|
However, practically speaking, eating raw Fugu in a restaurant in Tokyo probably carries significantly less risk than eating at any fast food chain. I haven't counted, but I would guess that there are several hundred restaurants in the Tokyo area serving the fish to thousands of guests on a daily basis with no incidents. I've eaten it many times, but what I find most puzzling is that so many Japanese seem to think that it's a delicacy... Ok, it doesn't taste bad, it's just kinda bland (particularly raw without any seasoning). So, unfortunately, if you plan to visit Japan and had planned to "gamble with death" with eating Fugu, I have to dissapoint with the fact that you are probably taking higher risks each time you cross a street.
But ok, you want to come to Japan and you want to have something dangerous to eat? I can help you with that! A while ago one of the big thing in the news was a couple of fatal cases of food poisoning from people eating the raw beef dish "Yukke" at a Korean BBQ/Yakiniku place and more reports coming in from all over the country of suspected cases of food poisoning from said dish. If you want to have the highest possible chance of dying from eating this dish, I would recommend you to seek out the cheapest crummiest looking Yakiniku places you can find. To ensure the worst possible raw material, I would recommend one of those "eat as much as you can for almost nothing" places.
As proper regulations for preparing Yukke now has gotten much much stricter, it seems like many places go around this by making a similar dish but just calling it another name, thus dodging the regulations and still giving you a fair shot at a glorious death from food poisoning. Best of luck!