They are polite and friendly to (potential) customers. You won't see the 'want to buy quickly buy, don't want to buy please fuck off' attitude from them.
To random strangers their politeness and friendliness are a mixed bag. More politeness than friendliness.
You'll feel very grand to be a Japanese customer as they will treat you like kings. Likewise, if they are your customers, they would expect the same treatment as well. I personally experienced this myself.
that was the past la. everyone suffered and lost loves ones. but it dosent mean their children and grandchildren are also to be blame for their grandfather mistake.
it is the same thing a father is a murderer do we still blame his children?
if we still have hatred in our heart and not move on we can never be at peace.