This is the 9799th most frequent Japanese word.
裏山
"裏山" (urayama) means "the hill or mountain behind [a place]."
In this sentence, '裏山' refers to the physical small mountain or forested hill located behind a community or home.
裏山にはたくさんの動物が住んでいます。
Many animals live in the back mountain.
Here, '裏山' describes a specific landscape visible and often referenced in the speaker's daily environment.
私は庭から裏山を見るのが好きです。
I like to look at the back mountain from my garden.
'裏山' in this context emphasizes the geographical and scenic setting enhancing the peaceful ambiance.