I actually like this policy. It is strange that today society and the workplace will still indulge addiction. (I’m an ex 30 year cigarette smoker. Free for more than a decade.)
Former smoker here also but never took any smoke breaks. OH! - no doubt because in the “old” days, we could smoke at our desks! HA! Even when that changed, we only took one morning coffee break and one afternoon coffee break. They must be allowed a lot of breaks in Japan....
That's why they are very decent people, LOL. Then, I've come to realize I have habits which may repel some people. I eat too much and have a love for salty and spicy food. I've got other bad habits which I do not care to list on a public form . . . so have joined the "live and let live" school of life.
BTW, I worked in Japan for 14 years some 15 years ago. Smoking was "in your face" and nasty in those early years. So I applaud this policy, but think it is realistically closer to 1-2 days than six. Maybe the extra four is for what it saves the company in health insurance costs.
This is Japan. In Japan, smoking is still very much more common and accepted than it is here. If you dislike being around smokers, Japan is not where you want to be.