Niigata Metro 新潟地下鉄
Niigata Subway 新潟地下鉄, while a significant portion of subway networks in Japan are indeed subterranean, especially in the dense central areas or wetland areas, which would be most of the line...Many lines would likely emerge from tunnels and run above ground for substantial stretches, particularly as they extend into areas that are dry in the suburban areas. Through services are rail-lines that seamlessly connect to other railway companies' lines like JR East or Echigo Tokimeki Railway. These connecting lines are frequently above ground, and the Tokyo Metro trains simply continue operating on those elevated or ground-level tracks.