Shijumagari Pass

Overview

Shijumagari Pass is a Category 3 climb in Japan that runs for 10.1 km. It starts at 436 m and tops out at a summit elevation of 803 m, giving a net elevation gain of 367 m over its length. On paper that reads as a steady, moderate ascent, and the 3.65% average gradient reinforces that impression.

The paper figure is misleading. The climb records 843 m of total ascent against just 367 m of net gain, which means roughly 476 m of descending is folded into the route. That undulation is the defining feature here: you climb far more than the elevation change between bottom and top suggests. Expect to spend real energy on sections that give nothing back to your net altitude, and plan your effort around the total ascent rather than the net number.

How the Gradient Unfolds

A 3.65% average across an undulating profile tells you almost nothing about the terrain underfoot. With 843 m of total ascent packed into 10.1 km, the gradient swings hard around that mean, and there are ramps far steeper than the average implies. The steepest pitch reaches 30.44%.

• Flatter and downhill recovery stretches that drop your net altitude between the climbing sections
• Repeated short climbs stacked back to back, each clawing back elevation you just lost
• A single severe ramp at 30.44% that will spike your effort well beyond anything the average suggests

Pacing Notes

On a climb this undulating, even-speed pacing is a trap. Holding a constant speed forces your power sky-high on the steep ramps and lets it collapse on the descents. Instead, pace to even effort: hold a steady sustainable power output and let your speed fluctuate with the terrain. Ease slightly before the descents so you recover, and accept that the 30.44% ramp will briefly demand a surge no pacing plan can smooth over.

If you do not already know your ceiling, run the numbers through the FTP estimator before you ride, then set a target well under it. With 843 m of total ascent, the repeated efforts add up faster than the modest average suggests.

Gearing

The 30.44% maximum gradient governs your setup, not the average. That pitch is steep enough to stall a rider on standard gearing. Fit a compact or sub-compact chainset paired with a wide-range cassette — think 34×32 or 34×34 — so you keep a spinnable cadence when the road kicks up.

Check your drivetrain before the ride. Confirm the cassette range and that the rear derailleur can handle it. Arriving with too tall a bottom gear turns that ramp into a walk.

Summary

• Length: 10.1 km
• Average gradient: 3.65%
• Maximum gradient: 30.44%
• Net elevation gain: 367 m
• Total ascent: 843 m
• Category: 3

Shijumagari Pass rewards riders who read past the average. Pace to effort, gear for the steepest ramp, and respect the 843 m of climbing hidden inside a 367 m net gain.