These are interesting: http://www.ne.jp/asahi/t/katoh/ but only in japanese. I think that japanese Shade tutors and programmers should use english instead or togheter their language.
Those are OSX only. I use them regularly with Shade. IMHO the best add-ons for Shade in general. If you have questions about those add-on's, the author of the programs speaks English too. Other plug-in's for Shade are sometimes also in English language, even if they show up on sites in Japanese. Then you have also the option, in case of Python scripts to translate the menus into English via Google translator, so that you have an English version.
I would also not expect that Mirye will translate the many plug-in's which are available in Japan, because it's simply not the job of a Software company to translate other authors software, while not making any cent out of it…