Previously, there were problems in that Onjo-ji Temple and Shirahige-jinja Shrine demanded compensation for passing the precincts of the shrine (although it was a tunnel); the local people opposed the construction; and the determination of tracks took time due to the relationship with Kojak (Kojaku) railway (江若鉄道) (described later); however, the minimum curve radius is basically set at 1,400 meters and the alignment (track) slope is set at no more than 19 per mill, which are high standards compared with existing railways.
園城寺や白鬚神社などでは境内通過（トンネルだが）を巡って補償騒動が起きたほか、地元からの反対、江若鉄道（後述）との関係で路線決定に難航した部分もあるが、最小曲線半径は1,400mを基本とし、線形(路線)勾配も19パーミル以下と在来線としては高規格で建設されている。