How to say "hydra" in Japanese
Choosing the right word
- nounThe katakana rendering of 'Hydra': the many-headed serpent of Greek myth, and also the name used in biology for the tiny freshwater animal. For either sense, this is the word to reach for.
- 海蛇座うみへびざnounThe Japanese name of the constellation Hydra, literally 'the Sea Serpent'. Use it only when the subject is the stars — in astronomy or stargazing contexts — never for the mythical monster or any other 'hydra'.
- nounAnother katakana rendering of 'hydra', closer to the English sound. It turns up chiefly as the name of an organization or monster in games and fiction; for the myth or the animal, use ヒドラ.
Use 「ヒドラ」 for the mythical many-headed monster (and the freshwater animal of that name), 海蛇座 only for the constellation, and 「ハイドラ」 chiefly in proper names from games and fiction; all three are less common words.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
