I recently had a look at the .docx export of the document grid for asian characters. It was not implemented at all and the .doc export was buggy. After some time constantly not skipping a word in the OOXML specifications, I finally had a working implementation and could fix the .doc export. Here are some screenshots to help you understand what I'm writing about. Mind the number of asian characters per line...
The layout in OOo
The buggy layout in Word
The layout in Word after the changes
The fix is already available on the master branch of ooo-build git repo.