This is the 7220th most frequent Japanese word.
上町
"上町" (Kamimachi) typically refers to "Upper Town" or a specific district/area in Japan.
In this sentence, '上町' is used as a proper noun referring to a specific place or neighborhood called Kamimachi.
上町には古い神社があります。
There is an old shrine in Kamimachi.
Here, '上町' signifies the location where the restaurant is situated, being used similarly as a proper name for that area.
私は上町にあるレストランで昼食を食べました。
I had lunch at a restaurant in Kamimachi.
In this example, '上町' describes the district known as Kamimachi that houses the shopping street, maintaining its function as a geographical identifier.