水 門(すいもん)

すいもん

noun

sluice gate; floodgate; water gate

building

1. sluice gate; floodgate; water gate

A gate or barrier used to control the flow of water in rivers, canals, dams, or irrigation systems.

水門(すいもん)を開(あ)けた。

They opened the floodgate.

大雨(おおあめ)に備(そな)えて水門(すいもん)を閉(し)めた。

They closed the sluice gate in preparation for heavy rain.

この川(かわ)には洪水(こうずい)を防(ふせ)ぐための水門(すいもん)がいくつも設置(せっち)されている。

Several floodgates have been installed along this river to prevent flooding.

A compound of 水(すい) (water) + 門(もん) (gate). A gate or barrier used to control water flow in rivers, canals, and dams.

Common collocations

水門(すいもん)を開(あ)ける: to open a sluice gate
水門(すいもん)を閉(し)める: to close a sluice gate
防潮(ぼうちょう)水門(すいもん): tidal floodgate
排水(はいすい)水門(すいもん): drainage gate

Cultural note

Japan's many rivers and flood-prone geography make 水門(すいもん) critical infrastructure. They are frequently mentioned in news during 台風(たいふう) (typhoon) season and 大雨(おおあめ) (heavy rain) events.

Related words

ダム: dam
堤防(ていぼう): levee, embankment
放水(ほうすい): water discharge
治水(ちすい): flood control

Related Words

Related: ダム (dam)

Related: 堤防(ていぼう) (levee, embankment)

Related: 治水(ちすい) (flood control)

general

Added 2026.3.23 19:22 · Revised 2026.9.2 13:01

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