its not like any other country was made to look good, the USA was made to look the worst same with Canada and Russia. Japan just had one shi*** guild but in comparison to the USA who were shown to be greedy and manipulative the whole series aswell as the one guys brother being evil the entire time, Russia only having one character who was portrayed to be an alcholic and cocky, and Canada being shown to be radicalists, I dont think Japan was sh** on that much, just a couple "evil" characters but nothing to to bad. So It doesn't really make sense for them to change it that drastically when the animating studio is already gonna do it anyway and I dont even think they really care its just the fans that dont like it.