Kilauea

Kilauea (キラウエア) is the "Land of Fire" (火の国) where Musshuru was once exiled to.

History
After Musshuru 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 during the ninth movie, and has not made an actual appearance in the series.