If you are coming soon, the evenings are already getting chilly in Hokkaido. You may want one if you go out at night. But if you are not extremely overweight, you can find sweaters at Uniqlo if you need them.
If you are quite big, try the men's section.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.