 2 Neya River, it reaches , the greatest depth of any line in the Osaka subway network; however, the line's stations are not as deep as the station on the Nagahori Tsurumi-ryokuchi Line).Because of this, it also features a greater number of steep grades compared to existing lines.The ground stratum the Imazatosuji Line runs through is a "super-soft clay deposit", which is soft and has a high water content; in many instances, bulldozers were useless in excavating the soil.