- filehook package
- stfloats package
- Harano Aji fonts (https://github.com/trueroad/HaranoAjiFonts)
+ more specifically, HaranoAjiMincho-Regular and HaranoAjiGothic-Medium
Using LuaTeX-ja with LuaHBTeX is not well tested.
One might be able to typeset documents without an error, but with