Yeah, I've noticed the command line can have issues with unicode character names when using the default encoding, so indeed, using a CHCP command at the beginning to change it can help.
It would be "CHCP 65001" for UTF-8, you'll also need to change the display font to Lucida Console (or that least according to some other threads) if you want to have those names displayed correctly (if/when applicable).
Edit : well that's weird, I seem to remember having this trick work a while ago on my computer, but today it doesn't want to display Japanese characters correctly in the console :/