If you go before they open the road to the busses you can go up to the snow line and back down. No guard is present on the Nagano side in late Feb. early March, but the road has rocks everywhere. Really the most open faced mountain ride besides Norikura you will find in this area. Some of the drainage grates are uni directional and are wide enough to fit a road tire. I was climbing, taking in the view not paying attention and I went over the bars. I recently went out there and was laughed at.