This is the 1542nd most frequent Japanese word.
下関
Shimonoseki: A city in Yamaguchi Prefecture, Japan.
In this sentence, '下関' refers to the proper noun, the name of the city Shimonoseki.
下関は歴史的に重要な港町です。
Shimonoseki is historically a significant port town.
Here, '下関' is used to describe the location as a destination for a journey.
私は下関に旅行したいです。
I want to travel to Shimonoseki.
In this example, '下関' is used to mark the place where certain renowned cuisine is known.