noun
mountain railway
Refers to a railway line that runs through mountainous terrain, often used for sightseeing or access to mountain resorts.
この登山鉄道は、山頂まで約一時間で到着します。
This mountain railway reaches the summit in about one hour.
Compound of 登山 (tozan, 'mountain climbing') and 鉄道 (tetsudō, 'railway').