Translation guide
A marsh is a wetland often dominated by grasses, reeds, and other non-woody plants. In Japanese, the most common and general term is 沼 (numa), but other words like 湿地 (shicchi) and 湿原 (shitsugen) are used depending on size, vegetation, and context.
The most common way to refer to a marsh, swamp, or bog in everyday Japanese.
The most common and versatile word for a marsh, swamp, or bog. It can refer to anything from a small pond-like marsh to a larger wetland. Often used in place names.
この沼にはたくさんの鳥がいます。
There are many birds in this marsh.
子供の頃、近くの沼でよく遊んだ。
As a child, I often played in the nearby marsh.
A more technical or formal term for 'wetland' or 'marshland'. Often used in environmental or geographical contexts.
この湿地はラムサール条約に登録されています。
This marsh is registered under the Ramsar Convention.
Refers to a marshy grassland or moor, often with a connotation of a wide, open wetland. Common in nature writing and place names like 釧路湿原 (Kushiro Marsh).
釧路湿原は日本最大の湿原です。
Kushiro Marsh is the largest marsh in Japan.
When the marsh is small, stagnant, or pond-like, often with muddy water.
Specifically refers to marshy land or a boggy area. Emphasizes the ground being wet and muddy.
その沼地には近づかないほうがいい。
You'd better not go near that marsh.
Literally 'ditch marsh', implying a muddy, stagnant, and often dirty marsh or swamp. Can be used metaphorically for a quagmire.
彼は借金のどぶ沼にはまってしまった。
He got stuck in a quagmire of debt.
A coastal marsh influenced by tides, often with salt-tolerant plants.
The standard term for a salt marsh in ecological or geographical contexts.
塩性湿地は多くの渡り鳥の生息地です。
Salt marshes are habitats for many migratory birds.
Literally 'tidal wetland', a more specific term for a marsh affected by tides. Less common than 塩性湿地.
この潮汐湿地には珍しい植物が生えている。
Rare plants grow in this tidal marsh.
沼 (numa) is the everyday word for a marsh or swamp, often smaller and more familiar. 湿地 (shicchi) is a broader, more formal term for any wetland, including marshes, swamps, and bogs. 湿原 (shitsugen) specifically refers to a marshy grassland or moor, often large and scenic. Use 沼 for general conversation, 湿地 in scientific or official contexts, and 湿原 for expansive, grassy wetlands.
English distinguishes between 'marsh' (grassy) and 'swamp' (wooded), but Japanese 沼 covers both. If you need to specify a wooded swamp, use 沼沢林 (shōtakurin) or 湿地林 (shicchirin), but these are technical terms.