Ushikubi Pass

Overview

Ushikubi Pass is a Category 2 climb in Japan that runs 16 km from base to summit. It begins at 420 m and tops out at 1,103 m, giving a net elevation gain of 683 m. On paper that is a manageable day out: the average gradient sits at 4.27%, the kind of number most riders can hold on aggregate without alarm.

The number that reframes the effort is the total ascent: 1,964 m against a net gain of just 683 m. That gap means roughly 1,281 m of climbing is repaid by descent along the way — the road rises and falls repeatedly rather than climbing cleanly. You will pay for elevation you then hand back, and every dip you coast through has to be re-earned. Treat this as a longer, lumpier effort than the net figure suggests.

How the Gradient Unfolds

A 4.27% average tells you almost nothing here. With this much undulation, the mean is a blend of descents, false flats, and pitches far steeper than 4.27%. The climbing is concentrated into repeated ramps separated by recovery, not spread evenly across the 16 km.

Expect the profile to break down roughly like this:

• Flatter and downhill sections where you recover, contributing nothing to net gain but padding the total ascent.
• Repeated short climbs stacked back to back, each one resetting your legs before the next.
• The steepest ramp well into double digits — the pitch that dictates your gearing and forces you out of any comfortable rhythm.

Pacing Notes

On an undulating climb like this, even-effort beats even-speed. Chasing a constant speed forces you to spike over every ramp and soft-pedal every descent, which burns matches you cannot get back across 16 km. Instead, hold a steady output and let your speed rise and fall with the road.

Anchor that output to your sustainable power output rather than to how you feel on the first ramp. Ride the climbs at or just below threshold, recover genuinely on the descents, and resist surging to hold a number. If you are unsure of your ceiling, run the FTP estimator beforehand and set a target you can defend on the last ramp, not just the first.

Gearing

The steepest ramp governs your setup, and it is steep enough that you should not ride this on standard road gearing. Fit a compact or sub-compact chainset paired with a wide-range cassette — a 34×32 or 34×34 gives you a bailout gear for the sharpest pitches while keeping usable ratios for the flatter and downhill sections. Check your chainset and cassette before you leave; discovering you are over-geared partway up a lumpy 16 km climb is a long, grinding mistake.

Summary

• Length: 16 km
• Average gradient: 4.27%
• Net elevation gain: 683 m
• Total ascent: 1,964 m
• Category: 2

Ushikubi Pass is a climb that rewards discipline over ambition. The gentle average and modest net gain mask a lumpy 16 km with nearly three times the climbing the profile first implies. Pace by effort, gear for the steepest ramp, and treat every descent as elevation you will have to buy back.