Mount Idonnappu1,752 m

Shinhidaka Town, Niikappu Town ・イドンナップ岳

NowMount Idonnappu today3D view built from GSI elevation data and recent aerial imagery. Use the buttons at top left to view from the north, east, south or west, or drag to rotate. On phones, move two fingers up or down to tilt, and pinch to zoom.

Loading the 3D view

GSI Tiles (elevation tiles, seamless aerial photos), processed by this site.

About Mount Idonnappu

Mount Idonnappu is a 1,752 m mountain near the boundary of Shinhidaka Town and Niikappu Town, Hokkaido. It lies within Hidaka-sanmyaku Erimo Tokachi National Park. It is one of eight mountains added in the 2003 revised edition of Hokkaido Hyakumeizan (100 Famous Mountains of Hokkaido).

Sources: GSI, Elevations of Major Mountains in Japan, MLIT, National Land Numerical Information: Natural Park Areas, Wikipedia, "Hokkaido Hyakumeizan" (list of the selection in the Yama-Kei book) (sources in Japanese)

Mountain data

Elevation: 1,752 m#38 of 156 by height
Elevation basis: Elevation pointGeospatial Information Authority of Japan, Elevations of Major Mountains in Japan (March 31, 2026)
Japanese name: イドンナップ岳（いどんなっぷだけ）
Location: Shinhidaka Town, Niikappu Town, Hokkaido
Area: Central Hokkaido
Natural park: Hidaka-sanmyaku Erimo Tokachi National Park
Active volcano: None
100 Famous Japanese Mountains: None
Hokkaido Hyakumeizan: Added in the 2003 edition (No. 51)

The location lists the municipality of the summit and any others within 300 m of it (checked with the GSI reverse geocoder).

Themes that include Mount Idonnappu

Nearby mountains

Nearby roadside stations

Straight-line distances from the summit.