noun
Shin'etsu Main Line
Proper noun referring to the JR East railway line connecting Gunma, Nagano, and Niigata prefectures.
信越本線は群馬県から新潟県まで走っています。
The Shin'etsu Main Line runs from Gunma Prefecture to Niigata Prefecture.
The name combines the kanji for Shinano (信濃, old province) and Echigo (越後, old province), plus 本線 (main line).