This is the 673rd most frequent Japanese word.
ローソン
"ローソン" (Rōson) is the name of a popular Japanese convenience store chain, Lawson.
Used as the proper name of a convenience store.
昨日の夜、ローソンでおにぎりを買いました。
Last night, I bought a rice ball at Lawson.
Refers to a category of convenience stores, using Lawson as an example.
日本では、ローソンのようなお店が便利です。
In Japan, stores like Lawson are convenient.
Specifically mentions the staff of Lawson, tying the name to service quality.