Unfortunately, once I power up Ubuntu 14.04 or 15.04, my computer won't recognize keycode 102. If I want to change "keycode any" after its first remapping via xmodmap, i noticed later last night to remap the Muhenkan key again without resetting the keyboard via the command: "setxkbmap -layout us" (which works for us keyboards), it no longer recognizes "keycode any" but rather the expected keycode 102, until i restart the computer.
In my hhkb script to work around any issue remapping the Muhenkan Key after invoking the script the first time without restarting and avoiding typing the setxkbmap command. I include in the hhkb.xmodmap file "keycode any", but I added this to my hhkb script, and it works perfectly:
~/hhkb.xmodmap && xmodmap -e "keycode 102 = BackSpace"