A1 noun Formel #3,650 le plus courant

河川

kasen /ka.seɴ/

A formal and technical term referring to rivers and streams as a whole. It is primarily used in administrative, geographical, and news contexts to describe waterways and their management.

Exemples

3 sur 5
1

この地域には多くの河川があります。

There are many rivers in this region.

2

大雨の影響で、河川が氾濫する恐れがあります。

Due to heavy rain, there is a risk that the rivers will overflow.

3

あの河川敷でバーベキューをしよう。

Let's have a barbecue on that riverbed.

Famille de mots

Nom
河川
Apparenté
河川法
💡

Astuce mémo

Visualize two kanji for water: 河 (big river) and 川 (three lines of flowing water) joining together to form a formal 'River System'.

Quiz rapide

ニュースで「___の増水に注意してください」と言っていました。

Correct !

La bonne réponse est : 河川

Exemples

1

この地域には多くの河川があります。

everyday

There are many rivers in this region.

2

大雨の影響で、河川が氾濫する恐れがあります。

formal

Due to heavy rain, there is a risk that the rivers will overflow.

3

あの河川敷でバーベキューをしよう。

informal

Let's have a barbecue on that riverbed.

4

日本の主要な河川の長さを比較する。

academic

Compare the lengths of Japan's major rivers.

5

河川改修工事の契約を締結した。

business

We concluded a contract for river improvement works.

Famille de mots

Nom
河川
Apparenté
河川法

Collocations courantes

一級河川 First-class river (major river system)
河川敷 Riverbed / Riverside park
河川の増水 Rising river levels
河川汚染 River pollution
河川管理 River management

Phrases Courantes

河川の氾濫

River flooding

河川改修

River improvement/rehabilitation

河川愛護

River protection/conservation

Souvent confondu avec

河川 vs

川 (kawa) is the general, everyday word for a river, while 河川 (kasen) is the technical or formal term used in news and documents.

📝

Notes d'usage

Use 河川 when reading news reports, weather warnings, or studying geography. In daily conversation about going to the water, use 川 (kawa) instead.

⚠️

Erreurs courantes

Learners often use this word in casual speech where it sounds overly robotic or like a news reporter.

💡

Astuce mémo

Visualize two kanji for water: 河 (big river) and 川 (three lines of flowing water) joining together to form a formal 'River System'.

📖

Origine du mot

Sinitic compound of 'ka' (large river/Yellow River style) and 'sen' (stream/three-lined river).

Modèles grammaticaux

Used as a common noun Takes the particle 'の' to describe related concepts (e.g., 河川の浄化)
🌍

Contexte culturel

Japan's mountainous geography means its 河川 (rivers) are typically short and fast-flowing compared to continental rivers.

Quiz rapide

ニュースで「___の増水に注意してください」と言っていました。

Correct !

La bonne réponse est : 河川

Mots lis

協力

A1

Cooperation or collaboration where two or more people combine their efforts to achieve a common goal. It is used in both personal and professional settings to describe working together as a team or providing assistance.

提案

A1

A suggestion or proposal of a plan or idea for others to consider. It is used in both casual conversations and professional meetings to introduce a potential course of action.

輸出

A1

The act of sending goods or services produced in one country to another country for sale or trade. In Japanese, it functions as a noun and a suru-verb, representing the 'exit' of products from a domestic market.

輸入

A1

The act of bringing goods, services, or materials into a country from abroad for sale or use. In Japanese, it functions as a noun or can be combined with 'suru' to become a verb meaning 'to import'.

資源

A1

Shigen refers to valuable materials or assets, such as natural minerals, energy sources, or human talent, that can be used for production or survival. It is widely used in economics, environmental science, and daily life to describe both raw materials and abstract wealth.

保護

A1

The act of keeping someone or something safe from harm, damage, or loss by providing care or creating boundaries. It is a versatile term in Japanese used for social welfare, environmental conservation, and digital security.

観察

A1

Observation is the act of watching someone or something carefully in order to gain information or understand a process. It is frequently used in scientific studies, nature analysis, and describing the act of paying close attention to details.

競争

A1

Kyousou refers to the act of competing or vying with others to achieve a goal, win a prize, or establish superiority. It is a versatile term used in sports, business, and academics to describe both structured contests and general rivalry.

拡大

A1

The act of making something larger in size, scale, or scope. It is frequently used for physical enlargement (like a photo) or abstract growth (like a business or a problem).

製造

A1

The process of making or producing goods, typically on a large scale using machinery. It refers specifically to industrial manufacturing rather than making things by hand on a small scale.

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