Safely assuming that Satoshi Nakamoto is a pseudonym, why do you believe he (also, safely assuming, albeit I have another theory) choice that one as his moniker?
~Bruno~
His girlfriend at the time was japanese. In bed she would sometimes yell "Satoshi" which is the real name of her Ex Boyfriend. So out of feeling creeped out during sex with her, he decided that secretly, HE would now be Satoshi Nakamoto so that when his girlfriend cums, she's cumming for him.
Simply psychology ladies and gentlemen.