Translation guide
Refers to the part of a river or stream near its source. In Japanese, this is commonly expressed with the word 上流 (じょうりゅう).
The section of a river closer to its source, often in mountainous areas.
The standard term for the upper reaches of a river. Used in both everyday and technical contexts.
There is a dam in the upper reaches of this river.
Literally 'upstream' or 'upper part of a river'. More common in everyday speech than 上流, but can also refer to the direction upstream.
Refers specifically to the source or headwaters of a river. More technical or literary.
The water in the upper reaches is very clean.
川上の方へ行くと、水が冷たくなります。
If you go toward the upper reaches, the water gets colder.
その川の源流は深い森の中にあります。
The source of that river is deep in the forest.