How can I open files that have Japanese filenames?

I organize my Japanese ebooks and manga using the respective Japanese titles as filenames. I then access this content from my Anrdoid device by mounting a cifs share with cifsmanager. However I cannot open the media using my Android 4.1 (AOSP) device. The non-ascii characters in my filesystem show up as just question marks, e.g. /mnt/sdcard/manga/??????/. The error behavior that various apps will give range from File does not exist (File Manager) to nothing at all (PerfectViewer).