Kenashi Pass is a high mountain pass at an elevation of 1,910m (6,266ft) above the sea level, located on the border between Gunma and Nagano Prefectures, in Japan. The pass is traversed by the Gunma-Nagano Prefectural Road 112.
The road to reach the pass is asphalted, averaging at 8% with peakes to 10%. The road includes many blind curves and hairpin bends. Learn to use the mirrors provided on corners and don’t expect too much courtesy from drivers, they may not be locals or expert in mountain roads, it is a tourist area.
On the top of the pass there are several disused transmission towers Grades are consistent at around 7% with a few spots straining the legs at 10-11% and only one or two ‘flat spots’ at 5%. In 1937, 245 people died in sediment disaster. In spite of disasters, people continued digging until 1971. Now the land is still friable and it is dangerous to reach place where town was located. Beyond the pass, the road continues 3km to the Ogushi sulfur mine ruins. This last section of the road is gravel.