Japan's highest paved road, remote switchbacks, and a support van that always finds you.
The Norikura Skyline is the highest paved road in Japan, closed to private cars and open only to bikes and buses, 14.4km, a 12% maximum grade, and a finish at Tatamidaira, 2,716m up. Everything else on this trip is built around that one climb: onsen towns to recover in, waterfalls and forest roads to warm up on, and enough altitude days to make sure the Skyline itself is a celebration, not a survival exercise.
Settle into the highland village at the mountain's base and spin out a gentle shakedown loop through cedar and birch forest roads, flat enough to shake off travel legs.
A 700-metre walk from the visitor center to Zengoro Falls, a 21.5-metre drop right at the edge of the village.
A longer loop through the highland's forest roads to build fitness before the climbing starts in earnest.
Detour to Sanbondaki, where three separate cascades pour 50 to 60 metres over the edge of an old lava plateau.
Ride to the hot spring village at 1,400m, tucked into a gorge below Norikura, six hundred years of history and water so mineral-rich it runs opaque white.
Soak in Shirahone's milky water: local wisdom says three days here means three years without a cold.
A short day exploring the onsen village and the gorge it sits in, easy riding and easier soaking.
Walk the riverside gorge trail past a string of smaller waterfalls below the village.
The approach begins: riding the Echo Line up through subalpine forest as the trees thin and the first real views open up.
The first unobstructed sight of Norikura's volcanic cone from the road.
The tour's centerpiece: 14.4km and up to a 12% grade, closed to private cars, climbing to Tatamidaira at 2,716m, the highest point in Japan a paved road actually reaches.
For anyone with legs left, the 90-minute hike from Tatamidaira up to Norikura's 3,026m summit.
A day to acclimatize at Tatamidaira and the highlands just below it: short, easy spins and a lot of standing around looking at the Northern Alps.
On a clear day, Yarigatake and the Hotaka peaks are visible from the plateau, along with snow that never fully leaves the mountain's shaded slopes.
The payoff for everything so far: the same switchbacks in reverse, the support van shadowing every bend on the way down.
Easier riding through the valley below, legs recovering, with the option of a non-cycling shuttle excursion into Kamikochi for anyone who wants it, bikes aren't permitted into the valley itself, but the alpine scenery is worth the detour.
Optional shuttle side trip into Kamikochi's protected alpine valley.
Retracing forest roads through the highlands with fresh eyes and considerably fresher legs than the climb days.
Revisit Zengoro or Sanbondaki falls at a slower pace this time.
One more easy day around the highland village before the trip winds down, free time, short rides, whatever the group wants.
Transfers out of the highlands and home.