How to say "marsh" in Japanese

Choosing the right word
  • 沼ぬまJLPT N1approx.Common
    nounThe plain word for a marsh or swamp: a stretch of wet, waterlogged ground or shallow standing water. When you simply mean a marsh, this is the word to reach for.
    その沼ぬまにはサギがたくさん住すんでいる。↗
    Lots of herons live in the marsh.
  • 沼沢しょうたくCommon
    nounA compound of 沼 and 沢, it covers marsh, swamp and bog; its flavor is descriptive, the sort of word found in writing about terrain and landscape rather than in everyday speech.
  • 泥沼どろぬまCommon
    nounLiterally a muddy bog or marsh, but its most familiar use is figurative: a quagmire, a situation you sink ever deeper into. For actual wet ground, 沼 is the safer choice.
  • 湖沼こしょうCommon
    nounA collective term for lakes and marshes, inland waters as a category; it belongs to geography and official usage. For a single marsh in everyday speech, 沼 or 湿地 is the natural choice.
  • 湿地しっちCommon
    nounThe general word for wetland: damp, waterlogged ground as terrain or habitat. A marsh thought of as a wetland environment is 湿地; it points to the wet land rather than a body of water.

Use 沼 for an ordinary marsh or swamp, 湿地 for wetland as damp ground or habitat, 泥沼 for a bog or a figurative quagmire, 沼沢 in descriptive writing about terrain, and 湖沼 for lakes and marshes collectively.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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