The old road has been narrow (one lane going each way) and winding, because the area is a steep topo.

[3][4] Furthermore, as the Matsuhime Bypass (3800m) was open to traffic as a new road of Japan National Route 139 in 2014, the old road was closed due to reconstruction from March to September 2015.

The old road had been accessible from October 2015, but has been closed due to danger of falling rocks and landslides since 2019.

[5] For the above reason, the mountain pass has been accessible by car only from Kosuge, Yamanashi since 2020.

[6] Access to the mountain pass, is only a bus route.