This example shows how to write LaTeX in Japanese with the CJK package. WriteLaTeX includes a full set of fonts for Japanese, and we use UTF-8 encoding, so you can type Japanese characters directly into your LaTeX source code and have them appear in the output. This example is from Akiniwa's blog post.
This Blackboard beamer theme and template was created by Kazuki Maeda <email@example.com> for Japanese presentations, but can be used for English (or other European languages) presentations as well. It has been modified to work with XeLaTeX.
p/s: The blackboard background was drawn with TikZ; the code is also included in the template.