Hi Pander,can you attach that .tex to a reply, since the page you linked to has inserted delicious and utterly useless linebreaks =)
I've done Japanese vertical typesetting using XeLaTeX and Fontspce (although I ditched Memoir at some point because it wasn't playing nice enough with glossaries and indices).
- Mike "Pomax" Kamermans nihongoresources.com -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex