Opened for traffic in March, 1973, this tunnel has a length of 1199m, (width: 8 m), which is the third longest tunnel of National Road No. 162, next to the Hatagoyama Tunnel that is also linked to National Road No. 27, and the Horikoshi Tunnel located at the border of Fukui Prefecture and Kyoto Prefecture.
1973年3月に開通し、延長1199m、幅員8mで、国道162号のトンネルの中では国道27号と重複中の旗護山トンネル、福井県境の堀越トンネルに次ぐ3番目の長さを誇る。