Slowly but surely Japan is adopting tougher measures to combat smoking, with tobacco related bylaws restricting where people can or can’t smoke, plus also dealing with issues such as the throwing away of cigarette butts.
That said, the emphasis is still very much ‘manner’ related, with how (rather than if) you smoke being priority number one.
With this in mind, the district where the picture below was taken clearly points out that smoking is allowed; however doing so in an elaborate and/or aloof manner is strictly forbidden.