Unpopular is a weird word; I assume you mean “looked on unfavourably?” But then, which part are you referring to? Japan’s pacific colonisation and surprise att

Unpopular is a weird word; I assume you mean “looked on unfavourably?” But then, which part are you referring to? Japan’s pacific colonisation and surprise attack on the US are already frowned upon, the US’s use of nuclear weapons is also generally frowned on. The only part that I think people generally agree with is the US fighting Japan to push back their empire.