Re: AltGr on Japanese keyboard
The "jp" keyboard layout (/usr/share/X11/xkb/symbols/jp) does not
seem to specify any 3rd (or 4th) level symbols. I do not know what
you want to do with your AltGr key, but if it is to get things
like AltGr-5 = Euro symbol, or AltGr-minus = dead macron key, you
or perhaps in your case
I do not have a Japanese keyboard so I cannot test it completely.
Please tell if this works or not.