Chinese, Korean and Japanese requires a dedicated "input method"
to enter the characters in Linux.
When I went to "install language packages"(APTus), their package is not included.
It is only the language files of Iceweasel and LibreOffice is installed.
Sparky developers can add the input method to "install language packages"?
For specific input method of the package for the Japanese,
I have a ready that can provide it. If possible, I would add the Japanese fonts in there.