I am trying to reference the wikipedia commons image in an english wikipedia info box. The image is a wikimedia commons picture with a japanese name. Somehow it does not allow it to be placed there. Is there a special way to reference non romantic language file names in images?
You should ask this on en-wp, not here! see WP:PICTURE, you can use the methods described on that page for any kind of file name, just copy the complete file name and paste it in the wiki code.
If you have more questions like this, see these pages on English Wikipedia: