This is the 4523rd most frequent Japanese word.
山手
"山手" means "hillside" or "upland."
In this sentence, "山手" refers to a specific railway line in Tokyo known as the Yamanote Line.
山手線は東京を囲む環状線です。
The Yamanote Line is a circular railway that surrounds Tokyo.
Here, "山手" signifies a region or area, specifically the Yamate District, associated with hills or elevated land.
横浜には山手地区という高台にある住宅地があります。
In Yokohama, there is a residential area called the Yamate District located on a hill.
In this usage, "山手" describes a general elevated or hilly area where the park is situated.