Smoking is cheap and tolerated in Japan. You never meet a smoking Nazi here. I am a pack a week smoker and find it refreshing but.... smokers in Japan have no real manners or consideration for others. They need some more societal pressure to act responsibly.
Smoking rule #1. It is never ever cool to smoke in the car with your kids. This drives me insane. When my Japanese gets better I am going to start speaking up about this more.