Wow
Too many racist.
Lets judge the manga based on its content, not because you personaly hate Japan because of the past (WW2.) you warmongers.
Art: 8/10 The art is very good, what art do guys wants? Big eyes? Spiky hairs? Something unrealistic?
Story: 7/10 this is a good idea, just like GATE. Their govt did the right thing, they make friendly to other countries/kingdom so they secure FOOD IMPORTS, and since its just starting, they are looking forward to import all they will need before they could have a big crisis.
The story is just too fast.
It also didnt show what the Japanese poeple would react, the effect, etc. Japan seems like "nothing happened at all" after their whole country got isekai.