Bitcoin is in many main languages but not Japanese. Why would the guy who created it not make it in his own language? Don't you find it suspicious MtGox is in Japan?
Satoshi is just a nickname, so I don't understand why you are kind of implying that because of this he/she/they is/are supposed to be Japanese. Also because of the way the bitcoin papers were written it's clear that English is the first language. Anyway the papers have been translated in a second time in other languages by other people, so if they're not in Japanese is just because nobody decided to translated them.
Lol you’re reply to a post from 2011 and someone who’s not been logged in to this website for several years. I of course agree with you that the name Satoshi was likely completely made up out of something that has nothing to do directly with bitcoins creator, but they didn’t necessarily really know all this back in 2011.