Japanese LaTeX support
Currently, sphinx LaTeX cannot handle Japanese documents because original LaTeX cannot handle Japanese wide-characters, encodings and etc.
To handle Japanese LaTeX documents, commonly publishing TeX, pTeX: http://www.ctan.org/tex-archive/language/japanese/ptex/, is used (TeX Live 2010 contains pTeX).
I wrote patch to handle Japanese documents with pTeX. Pleae add this patch to the distribution.