Porn in convenience stores may seem odd to my/our western viewpoint but I don't like how they keep changing to suit western tastes. Like the reduction in mixed onsen where you can sit with old ladies lol. What do they mean by porn? manga porn? The fuzed out pictures? Swim suits with suggestive poses? To us the easy reach to children is disconcerning. We do have the internet and unlimited availability so not like I'd be buying in a conbini anyway.
On smoking a lot has changed. no more smoking on trains even the shinkansen smoking cars are all gone I think. Some parts do not allow smoking on the street, I wonder why afraid of burns maybe? Heck I remember ash trays on airplanes decades ago yuck. Yes restaurants there is still smoking.