河川
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この地域には多くの河川があります。
There are many rivers in this region.
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.
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
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
この地域には多くの河川があります。
everydayThere are many rivers in this region.
大雨の影響で、河川が氾濫する恐れがあります。
formalDue to heavy rain, there is a risk that the rivers will overflow.
あの河川敷でバーベキューをしよう。
informalLet's have a barbecue on that riverbed.
日本の主要な河川の長さを比較する。
academicCompare the lengths of Japan's major rivers.
河川改修工事の契約を締結した。
businessWe concluded a contract for river improvement works.
Famille de mots
Collocations courantes
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
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
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
A1Cooperation 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
A1A 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
A1The 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
A1The 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
A1Shigen 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
A1The 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
A1Observation 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
A1Kyousou 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
A1The 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
A1The 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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