This is the 2485th most frequent Japanese word.
六本木
A district in Tokyo known for nightlife, dining, and entertainment.
Here, '六本木' is used as a proper noun referring to the district name.
六本木は東京にある有名な街です。
Roppongi is a famous district in Tokyo.
In this sentence, '六本木' indicates the location where the activity took place.
私は昨日の夜、六本木で友達と食事をしました。
Last night, I had dinner with my friend in Roppongi.
The term '六本木' is used here to describe a specific location within the Roppongi district.