Because the mountains of Hiei and Hira can be seen in the west and Lake Biwa can be seen in the east on almost every section of the Kosei Line, the line is known for its fine views.
そのため、西に比叡・比良の山脈を見上げ、東はほぼ全線に渡って琵琶湖の湖面を眺めることができるため、風光明媚な路線として知られる。