Comment 6 for bug 258595

I don't know, when this will get fixed, but this is quite annoying.
So to get at least hankaku/zenkaku and the ']', '}'-key working, I changed the /usr/share/X11/xkb/keycodes/evdev file.

added
<AC12> = 51; // for the ']', '}'-key

changed
<HZTG> = 93; // Hankaku/Zenkakau toggle
to
alias <HZTG> = <TLDE>;

changing
<AB11> = 211; // backslash/underscore
to
<AB11> = 97;
as reported by the xev-command did only work partially, I still don't get the backslash but the underscore.

If there is a better solution, please let me know.