I use data driven pages to export pdf files in Japanese, and in the PDF all I get is squares and some "" characters instead.
The Japanese displays perfectly fine in ArcMap
But in the PDF it shows squares instead, or when I'm using dynamic text, just "" characters.
I can see that the encoding is wrong. it needs to be UTF-8, but I found no way of achieving that with Google searching.
Checking "Convert marker symbols to polygons" doesn't help nor embedding the fonts.