Kuragari Pass

Overview

Kuragari Pass is a Category 2 climb in Japan that starts from sea level and tops out at 442 m, delivering 442 m of net elevation gain across 7.2 km. The average gradient of 6.15% sits comfortably in the sustained-effort zone, but the headline statistic — a maximum gradient of 26.98% — signals that the road gets genuinely brutal at least once before the summit. Total ascent of 456 m (slightly above net gain) indicates minor undulations along the route, so the legs never fully recover between hard ramps.

How the Gradient Unfolds

With an average of 6.15% over 7.2 km, Kuragari Pass is not a gentle warm-up. That average masks significant variance: the gap between 6.15% and the near-27% maximum is enormous, meaning the climb almost certainly front- or back-loads its steepest sections rather than distributing them evenly.

• Lower slopes: Expect the road to establish a steady, manageable rhythm in the early kilometres. Use this section to settle into a cadence and resist the temptation to push hard — the savage ramps ahead will punish an early red-line effort.
• Steep ramps: At 26.98%, the maximum pitch is among the sharpest gradients a rider will encounter outside a purpose-built velodrome. These sections are likely short but unrelenting. Standing and driving through them is viable for strong riders; less powerful climbers should gear right down and spin through at the cost of speed.
• Upper kilometres: After the steepest pitches, the road returning to something close to the average gradient will feel comparatively forgiving. If you have paced the lower and middle sections correctly, this is where composed riders can push the pace toward the summit.

Pacing Notes

The 6.15% average is deceptive given the maximum gradient lurking somewhere on the route. Treat Kuragari Pass as two climbs: the sustained moderate sections, and the explosive short ramps.

• Target a sustainable power output relative to your FTP on the moderate grades — roughly 75–85% for most trained riders.
• When the steep ramps hit, shift down before you stall. Cadence collapse on a 27% gradient is very hard to recover from mid-ramp.
• Use the FTP estimator to calibrate your effort zones before attempting a timed ascent.
• The 7.2 km length means this climb is long enough that pacing matters; blowing up 3 km in leaves a painful 4 km to the summit.

Gearing Recommendations

Do not underestimate the 26.98% ramp. Even a compact chainset (50/34) paired with an 11-28 cassette will leave most riders grinding uncomfortably. Consider:

• A 34-tooth chainring minimum on the front.
• A 32-tooth or larger sprocket on the rear — a 34 or 36 is preferable if your drivetrain supports it.
• Riders on 1x systems should ensure their cassette extends to at least 34t.

At nearly 27%, momentum is difficult to maintain and near-impossible to rebuild once lost. If you spin out cadence before the crest of the steep ramp, a brief controlled dab may be preferable to toppling at a standstill.

Summary

Kuragari Pass rewards riders who respect the data. The 6.15% average is honest work across 7.2 km from sea level; the 26.98% maximum is a genuine test of gearing choices and composure under duress. Pace conservatively on the approach, gear down early for the wall sections, and save a measured effort for the final push to 442 m.