While
Sayuri is not my favorite (is way too popular in Japan), I'd like japanese names to get used a bit more outside of Japan also for non-japanese children. Why wouldn't something simple "I thought the name was beautiful" or "I liked the meaning" be a valid reason to use a japanese name ...
In Japan they're using quite a few foreign names (of course adapted to their alphabet) like
Maria,
Marina,
Karin,
Karen,
Naomi,
Kai,
Lisa (as Risa),
Lina (as
Rina),
Lena (as
Rena),
Alice (as
Arisu),
Alica (as Arisa) etc.
The only japanese name i can think of that is used outside of Japan is
Ken (and that only because it's the same as the
Kenneth short form :)