Terrain visibility analysis

Can you see Mount Fuji from Onshi-Hakone Park?

Short answer: From the mapped outdoor viewpoint in Onshi-Hakone Park, Mount Fuji’s reference summit is topographically visible over 32.6 km, with high model confidence and a summit margin of about +529 m. Trees, clouds and haze can still hide it. This calculation uses ground level, not the observation building’s balcony.

Mount Fuji from the northwest ground-level viewpoint in Onshi-Hakone Park: a 32.6 km terrain calculation with a profile, exact coordinates and viewing limits.

View the calculation in Sightelo

Key figures

Observation point: Northwest ground-level viewpoint, Onshi-Hakone Park, Japan; Latitude, longitude: 35.1974431, 139.0258104; Modelled ground elevation: 750.0 m; Eye height: 1.7 m
Point of interest: Mount Fuji (Kengamine), Japan
Target elevation: 3,776 m
Straight-line distance: 32.6 km
Direction to the summit: 303.8° (northwest)
Modelled summit clearance: +529 m

Terrain profile and line of sight

Detailed profile

Scroll horizontally to explore the full profile on a small screen.

Calculated terrain
Observer–summit sight line
Minimum visibility line
Elevation reference: 0 m

Terrain already includes modelled curvature and refraction (k = 0.13). The grey curve projects a constant elevation of 0 m using that model; it is not an observed sea level. Subtract it from the terrain curve to read elevation. Sight lines remain straight; no second curvature correction is applied. Vertical and horizontal scales differ.

At the summit, the target clears the modelled horizon by 528.7 m. No blocking terrain is calculated. The relief forming the horizon is 31.033 km from A.

The calculation models terrain, Earth curvature and standard atmospheric refraction. It does not model buildings, trees, clouds, haze or local atmospheric variations.

Calculated profile values

Distance (km)	32.6 km
Observer eye altitude	751.7 m
Summit altitude	3776.0 m
Minimum visible target altitude	3247.3 m
Target margin above the modelled horizon	+528.7 m
Minimum local sight-line clearance	+51.3 m
Displayed / calculated samples	328 / 328
Excluded around A / B	200 m / 1500 m
Horizon-forming relief	31.0333 km

Audited calculation: 2026-10-22. The interactive calculator can recalculate with currently available elevation data.

What this example helps you study

The northwest outdoor viewpoint is mapped as OSM node 391237968, not the balcony of the Lakeside Observation Building. The fixed Fuji target is the same 3,776 m reference as the Tokyo and Yokohama examples. The summit stands about 529 m above the modelled horizon; minimum local clearance is about 51 m. Those are different quantities. Copernicus is a surface model: it does not resolve individual nearby trees or structures. The grey curve is a modelled constant 0 m elevation, not the observed lake surface.

Limits of interpretation

The calculation models terrain, Earth curvature and standard atmospheric refraction. It does not model buildings, trees, clouds, haze or local atmospheric variations.

Technical details

Observation point coordinates: 35.1974431, 139.0258104
Summit coordinates: 35.3606, 138.7274
Terrain model: Copernicus DEM 90
Eye height: 1.7 m
Refraction used: Standard (k = 0.13)
Sample step: 100 m
Uncertainty threshold: 30 m
Observer exclusion radius: 200 m
Requested summit exclusion radius: 900 m

A positive value means the summit clears the modelled terrain horizon. A negative value means the summit lies below the minimum elevation required to clear that horizon. This value is not the local height of blocking terrain above the sight line.