Nara Kotsu's Yagi-Shingu Line is a long route that stretches 169.9 km from Yamato-Yagi Station on the Kintetsu Line in Nara Prefecture to Shingu Station on the Kisei Main Line in Wakayama Prefecture, with 168 bus stops and a travel time of approximately 6 hours and 30 minutes.
Along the line are tourist spots such as the Tanize Suspension Bridge in Uenoji, Totsukawa Onsen, Kumano Hongu Taisha Shrine, Yunomine Onsen, Watase Onsen, and Kawayu Onsen, and in recent years the area has become popular with foreign tourists.
The Totsukawa Village Bus in Totsukawa Village, which runs along the Yagi-Shingu Line, began operating in 1975 as a school bus following the consolidation and closure of public schools, and was one of Japan's earliest village-run community buses.
Currently, Nara Kotsu Totsukawa Office is in charge of operation and management of the buses. There are 15 routes in total. Among them, the Nishikawa Line, which runs along National Route 425, a long stretch of narrow road, ends at Sako Nishikawa turnaround point, and is popular among bus enthusiasts.