Kilauea

The Land of Fire is where Musshuru was exiled to after he released a massive wave of poisonous spores that annihilated a massive portion of Drum Kingdom ten years ago. The land is most likely on fire, as he was sent here to neutralize the fire-weak spores. The Land of Fire is only mentioned in the ninth movie, and has not made an actual appearance in the series.

Trivia

 * The Land of Fire shares the same name as a country from the series "Naruto".