Σ64 ( talk ) · CC BY-SA 3.0 · Wikimedia Commons
Mountain in Nagano Prefecture, Japan
Mount Kisokoma is a mountain in the Kiso Mountains (Japan). Its summit stands 2,956 m above sea level. Its prominence — how far it rises above the highest saddle linking it to a taller summit — is 1,751 m.
From the lowest point within 5 km (1,336 m), it rises 1,620 m. The steepest side is the north-west face: 29° on average over the first kilometre. In places the ground near the top reaches 45° — terrain for climbers, not walkers.
The nearest town is Agematsu, 10 km away at 707 m: 2,249 m below the summit.
Scores
Two scores out of 10, built only from open data — every part is shown. They describe what the mountain offers, not how safe it is.
Hiking & mountaineering
8.0/10
Difficulty to the top
Hike
Most path sections around the top are T2 on the SAC hiking scale.
Indicative only — never a safety assessment. Conditions change: ask local guides and check the forecast.
Ski score
4.1/10
Runs by difficulty
Snow season on the slopes (estimate)
Around 1,207 m, in the middle of the ski area: snow from December to April.
7 lifts · 0 km cross-country
Ski (where OpenStreetMap has skiing within 12 km): up to 4 points for the length of downhill runs (300 km or more = 4), 1.5 for the number of lifts (40+), 1.5 for the vertical between lift stations (1,500 m) and 3 for the snow season — a month counts when the estimated mean temperature at the height of the ski area is −1 °C or lower and snow falls or lies there (NASA POWER, 2001–2020). Hiking & mountaineering: up to 2.5 for waymarked routes and paths, 1.5 for huts, 2 for the ascent from the valley (2,000 m), 1.5 for prominence (3,000 m), 1.5 for the season (months with summit afternoons above −5 °C) and 1 for via ferratas, climbing and glaciers. OpenStreetMap is built by volunteers: where few things are mapped, a score can be lower than reality.
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Snow
At the summit, snow from October to July. Month by month below, at different heights on the way up.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Summit2,956 msnow from October to July | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | No snow | No snow | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month |
Halfway up1,832 msnow from November to May | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | No snow | No snow | No snow | No snow | No snow | Snow on the ground all month | Snow on the ground all month |
Agematsu707 msnow from January to March (some years from December to March) | Snow on the ground all month | Snow on the ground all month | Snow on the ground all month | No snow | No snow | No snow | No snow | No snow | No snow | No snow | No snow | Snow some of the time |
Estimate for a normal year: average temperature and precipitation from NASA POWER, carried to each height, in a simple model of snow building up and melting. In a given year snow can come earlier or stay longer. It does not replace the local snow and avalanche bulletin.
Summit weather
Not a forecast: long-term averages (1991–2020), carried up to the summit. The orange line is where an average afternoon reaches 0 °C; above the dashed blue line it freezes even at dawn.
On an average August afternoon the summit reaches about 13 °C; on January nights it falls to about -21 °C. In 6 months of the year it stays below freezing at the top even in the afternoon. In August the 0 °C line climbs to about 4,980 m, above the summit: the top thaws on an average afternoon. Across the region, February is the driest month (86 mm) and July the wettest (234 mm).
| Month | Summit high °C | Summit low °C | Agematsu high °C | 0 °C line (m) | Rain & snow (mm) | Wet days | Sun h/day |
|---|---|---|---|---|---|---|---|
| January | -14 | -21 | 1 | 880 | 100 | 19 | 2.6 |
| February | -12 | -20 | 3 | 1,110 | 86 | 15 | 3.5 |
| March | -8 | -17 | 7 | 1,770 | 114 | 14 | 4.5 |
| April | -1 | -11 | 14 | 2,860 | 121 | 12 | 5.5 |
| May | 5 | -5 | 20 | 3,780 | 128 | 13 | 6.3 |
| June | 9 | 0 | 24 | 4,340 | 159 | 16 | 5.0 |
| July | 12 | 4 | 27 | 4,830 | 234 | 19 | 4.4 |
| August | 13 | 5 | 28 | 4,980 | 158 | 17 | 5.7 |
| September | 10 | 1 | 24 | 4,430 | 185 | 15 | 4.6 |
| October | 4 | -5 | 18 | 3,490 | 159 | 13 | 4.5 |
| November | -3 | -12 | 11 | 2,450 | 103 | 14 | 3.6 |
| December | -10 | -17 | 4 | 1,380 | 116 | 19 | 2.3 |
Estimate: the NASA POWER climate of a ~55 km cell (average height 1,184 m), adjusted to the summit by −6.5 °C per 1,000 m. Rain, wet days and sunshine are those of the region. Mountain weather changes fast — always check a local forecast. ★ = mildest months at the top.
Relief
Two cuts through the summit, 16 km long, from the 30 m Copernicus elevation model. Heights drawn 2× taller than lengths, so the shape can be seen.
Average slope of the first kilometre from the summit. The orange petal is the steepest side.
Around the mountain
Counted around the summit in OpenStreetMap, the map anyone can edit. The satellite plate shows 14 × 14 km.
N
5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 14 × 14 km, north up. Points © OpenStreetMap contributors.
敬神小屋, 五合目金懸小屋, 避難小屋 (1,297 m), 頂上山荘 and 11 more
駒ヶ岳ロープウェイ, 第二ペアリフト, 第一ペアリフト
中央道 伊那スキーリゾート, 駒ヶ根スキーリゾート
中央アルプス縦走路, 空木岳登山道, 木曽駒高原, 千畳敷カール遊歩道
日暮の滝
キャンピングフィールド木曽古道, 賽の河原テント幕営地, 木曽駒冷水公園
ねざめホテル, アルプス山荘, おん宿蔦屋, 木曽路の宿いわや and 9 more
36 path sections within 5 km, by SAC hiking scale (T1 easy walk … T6 difficult alpine).
OpenStreetMap is built by volunteers: a low number may just mean nobody has mapped it yet. Places © OpenStreetMap contributors (ODbL).
Recent years
Afternoon high at the summit (estimate). The first row is the reference, the 1991–2020 average in °C; the years show only the difference.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | -14 | -12 | -8 | -1 | 5 | 9 | 12 | 13 | 10 | 4 | -3 | -10 |
| 2020 | +3.5 | +2.1 | +2.6 | −2.6 | +0.4 | +1.1 | −2.0 | +1.2 | +0.3 | −0.8 | +1.3 | +0.3 |
| 2021 | +0.9 | +1.1 | +4.2 | +1.0 | −0.5 | +0.2 | +0.4 | −0.8 | −0.3 | +0.5 | ±0.0 | +0.6 |
| 2022 | −0.4 | −1.7 | +1.5 | +2.8 | −0.2 | +0.2 | +0.7 | −0.1 | +1.7 | −0.4 | +2.0 | −0.7 |
| 2023 | +1.0 | +1.3 | +5.3 | +1.8 | −0.2 | ±0.0 | +1.3 | +1.4 | +2.3 | −0.6 | +1.3 | +2.2 |
| 2024 | +2.1 | +3.2 | −0.7 | +3.8 | +0.8 | +0.2 | +0.9 | +1.4 | +2.6 | +3.1 | +1.7 | −0.7 |
| 2025 | +0.8 | −1.8 | +1.1 | +1.2 | +0.3 | +1.6 | +2.5 | +1.0 | +1.3 | +1.5 | +0.1 | +1.3 |
+1 warmer than usual −1 cooler than usual
| Names, elevation, prominence | Wikidata (Q3695791) · CC0 |
|---|---|
| Relief, 3D view, profiles | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 · CC BY 4.0 |
| Around the mountain | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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