How do you say caldera in Japanese?

火口 (kakou) is Japanese for crater, caldera. I would have forgotten it had yoiu not asked this. It's interesting since the kanji of it consist of kanji for 'fire' and 'mouth'.

Of couse since a lot of Latin words have found way into Japanese (called gairaigo), カルデラ (ka ru de ra) as Japanese reading of the same word also exists.