This is the 8174th most frequent Japanese word.
山谷
"山谷" means "mountains and valleys."
Here, "山谷" refers to a geographical area characterized by mountains and valleys, emphasizing its natural beauty.
山谷はとても美しい自然が広がる地域です。
The mountain valley is a region with very beautiful natural surroundings.
In this sentence, "山谷" metaphorically describes fluctuations or changes, such as highs and lows in progress.
プロジェクトの進展には山谷があります。
The progress of the project has its ups and downs.
The term "山谷" here directly means the physical valleys present between mountains, highlighting their appeal for hiking activities.