When distributed in America, Sailor Moon went through many changes to help appeal to an American audience. Aside from censoring violence and nudity from the original Japanese version, multiple instances of Japanese culture were removed from the show as well.
Mamoru's pet name for Usagi is "dumpling Head," referring to odango, a Japanese dumpling. Because odango isn't as popular in America as it is in Japan, Usagi is instead referred to as "meatball head." Additionally, the cast's names are Americanized, so instead of Usagi, Sailor Moon becomes Serena, Ami becomes Amy, Mamoru becomes Darien, and so forth. Obviously, kids won't think anything about this, but as adults know this show is from Japan, the Americanized names will definitely stick out.
On top of that, signs featuring Japanese were edited to exclude Japanese characters. This often results in blank building signs or posters that seem somewhat unnatural and out of place. And there are other subtler examples of Americanization demonstrated in the English dub as well. For example, images featuring roads are flipped so that cars drive on the right side of the road instead of the left. Considering that modern anime dubs are mostly unedited from the source, it's definitely strange to go back and see the extensive censoring of Japanese culture in a Japanese show.
