This is the 24th most frequent Japanese word.
宇部
"宇部" (Ube) is a city in Yamaguchi Prefecture, Japan.
In this sentence, '宇部' refers to Ube city, a place name in Japan.
私は宇部市に住んでいます。
I live in Ube City.
Here, '宇部' is used as part of a proper noun, 'Ube Airport,' indicating the name of an airport.
宇部空港で友達と待ち合わせしました。
I met my friend at Ube Airport.
In this instance, '宇部' directly refers to the location 'Ube,' and is used as a contextual setting indicator.