This is the 2228th most frequent Japanese word.
美祢線
"美祢線" (Mine Line) is a railway line in Japan connecting San'yō Main Line and Mine City in Yamaguchi Prefecture.
In this sentence, '美祢線' identifies the rail line called the Mine Line, illustrating its role as a transportation route.
美祢線は観光地に便利な鉄道線です。
The Mine Line is a railway line convenient for tourist destinations.
Here, '美祢線' refers to the rail line used for the traveling activity.
昨日、美祢線で旅行しました。
Yesterday, I traveled on the Mine Line.
In this statement, '美祢線' implies the scenic aspects associated with traveling or being near the Mine Line.