Hello.
I am using "GhostBSD XFCE".
I'd like to set the system default keyboard layout to "jp106".
If you know of how to set it, please give me a professor.

I'm using GostBSD Xfce and I'm using a Japanese keyboard. Bit I'm using Japanese OADG 109 a

To set the keyboard go to Settings > Keyboard > Layout (tab)

If the 'Use system Defaults' is checked, uncheck it and then look at the 'Keyboard Layout' box below.

If the layout is not Japanese click the add button and choose Japanese layout. This should be jp106.

Thanks a lot NevilleGoddard.
This problem was solved.

Your welcome! Greetings and welcome from Abiko in Chiba.