I thnik the current title, “Hirohito”, is more apropriate to an English (not Japanese) Wikipedia. Pratically nobody outside Japan calls Hirohito “Showa” — even the Popes cannot be used as example, because even non-Catholic people refers to them as their ecclesiastic names, that they get before they die. To bow our heads to “respect Japanese traditions” and rename the article to “Showa” is a repression of the freedom of speech in the name of political correctness — if people thought the same way, the image on the Mohammed Cartoons article should be deleted, too.