The full title of the PS3 game is Ni no Kuni: Wrath of the White Witch. Google Translate fails when I try to use the kanji, and the closest I can get is by writing the whole phrase in hiragana, which Google translates to:
The country of the
However, the title would become The country of the Wrath of the White Witch, which doesn't seem to make sense. Of course, this is dependent on a Google machine translation, so it might not even be reliable.
So I am wondering, what does Ni no Kuni mean given the context of the game?