Bar none the hardest thing for me to adjust to since coming to Japan has been the degree to which people smoke here. Coming from Boston where smoking in public (technically, "anywhere people are working") buildings has been banned for years, it was like stepping into Europe...except worse.
Here, a "no smoking section" is often a tiny area of a restaurant in which smoking is not allowed, though there is no means or motivation to prevent the massive quantities of smoke from the smoking section from wafting over and ruining my meal...every time I eat out. And literally, just about everyone smokes. Eat at a restaurant that allows smoking at all, and you're guaranteed a smoky time. Luckily, it does seem like restaurants that are fully smoke-free are slowly becoming more common.
This is not to say that I think people shouldn't smoke. If they want to do that to themselves, that's all well and good. I also don't think that they should stop smoking in places they're allowed to smoke. It's unfortunate for me, but it's their right. However, the one piece of the puzzle that has bothered me the most is smoking parents. I can't tell you how many times a day I see mom puffing up with her infant sitting right next to her. Do these people have any concept of "second hand smoke" health risks? Though I can't be sure, it certainly seems like they don't. Just look at (aforementioned) horrible implementation of non-smoking areas, as well as the blatant disregard smokers here have of the people and loved ones around them. In a culture obsessed with not ruffling the feathers of others, I find such a thing kind of out of place.
Of course, it doesn't help that the government has a large holding in Japan Tobacco. Why let anyone know how bad the shit is for you when a huge portion of your yearly budget comes from tobacco revenue?