These trains, which use Shay steam locomotives to climb up the steep mountain tracks, are a rarity anywhere in the world. Katakura says that as the trip up the mountain varies between flat and steep stretches of track, "the sounds are like they are coming from a living animal, going up and down, always overcoming obstacles. It moves me deeply whenever I hear it!"
這段火車由於使用具有高爬坡力的 Shay 式蒸氣火車頭，目前全世界非常罕見，加上爬坡路段時而平緩，時而陡峭，「聲音就像一頭活生生的動物，起起伏伏地不斷克服障礙，努力向上奮鬥，我每次聽都感動極了！」