On Sat, 19 Jul 2008, Ian Woollard wrote:
You need to get several heavy-duty-very-well-regarded sources that clearly says it's a mistake and then they would over-ride common usage and you can then move the article, otherwise no way.
That's equivalent to saying "you need to get sources for the result of a particular mathematical calculation" or "you need to get sources for how to translate Morse Code". I already provided a source about how to translate hiragana; you can look up the furigana yourself if you want to. (Ironically, there are several different romanization systems... and none of them affect this particular word.)
(I'm curious what you'd even think a "heavy duty very well regarded source" *is* for pop culture.)
And as someone pointed out, if an article were directly sourced using a book that was written in Japanese, we'd accept it without asking for a source for their translation. Translating a single word is a lot easier than translating a book.