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.
A sample of a multilingual document (Arabic, Greek, Hebrew, Japanese, Serbian, etc.) created with babel and lualatex.
See also the following resources:
Multilingual typesetting on Overleaf using babel and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here
Multilingual typesetting on Overleaf using polyglossia and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here
首都大学東京システムデザイン学部情報通信システムコース卒論用テンプレート
Faculty of Tokyo System Design, Tokyo Metropolitan University Information and Communication System Course Graduation Template