Problem while converting CDs to MP3/OGG...

I'm trying to rip some of my Japanese CDs using CDex, but when I access the remote CDDB to get the tracks names, I get lots of "?" instead of kanjis.
And when I convert the files, I get "_" in places of those "?" in the file names.

Please help.

The track names contain Japanese characters and your setup obviously can't handle it. Name them by hand.