SQL Server Reporting Services

I'm facing a small problem with reporting services.

If the report contains Japanese characters, and I export to PDF, the japanese characters are replaced by question marks.

I tried setting the fonts of the fields in the report designer to Mincho, PMincho, MingLu and any other font that could support japanese unicode characters, but in the end, the report is exported to PDF in Sans Serif.

Is there something I need to do in order for the reports to be exported properly?

SQL Server Reporting Services - Export to PDF