Japan · Niigata

Koshi Kogen Ski Area

古志高原スキー場
Off season
Official site
Snow and slopes at Koshi Kogen Ski Area
Photo: Tail furry / CC BY-SA 4.0 / Wikimedia Commons

No snow yet. Not open yet for 2026/27. We have not yet found an official opening date. Snow depth and the seven-day outlook appear once snow is on the ground or forecast.

Typical snowfall
433cm

A weather-model figure, worked out the same way for every ski area, and lower than what actually falls. Use it to compare ski areas, not against the resort’s own totals. How we measure →

Elevation
307–437 m
Across
0.6 km

Beginners and intermediates take the Onigiriyama course, while advanced skiers head for the Hibuse course. From the summit, the Echigo Sanzan peaks of Hakkaisan, Nakanodake and Komagatake line up to the south-east, and Sado Island is sometimes visible to the north-west. The canteen serves Yamakoshi-jiru, a soup made with vegetables grown by Yamakoshi farmers. Sources: nagaoka-navi.or.jp, city.nagaoka.niigata.jp, koshikogen.com (sources read 11 Oct 2026; an AI draft the site operator has not yet checked)

How much snow it gets

Modelled from weather data the same way at all 3,069 ski areas we cover. These are not the resort’s own published figures.

Seasonal snowfall
433cm
per season
Worst of 12 winters
170cm
The middle winter of the 12: 418 cm. The best: 676 cm.
World rank
127
of 3,069 worldwide
Rank in country
62
of 397 in Japan
Elevation rank
295
Highest to lowest, of 397 in Japan. The centre point sits at 369 m, 397 m below the national median.
Quality rank
266
of 397 in Japan
Temp when snowing
−0.9°C
Japanese median: −3.6°C
Rain days
47%
Japanese median: 16%
Days over 5 cm
29%
Japanese median: 15%
Wind when snowing
16km/h
Average daily peak, 10 m above ground across a model grid cell; not the wind on ridges or lift tops
Dryness 21
Frequency 82
Freedom from rain 35
Calm when snowing (model grid) 99

The tick marks the median across every Japanese ski area we measure. All four bars run the same way — longer is better.

The quality score leaves out how much snow falls (it uses temperature, frequency, rain and wind).

Compared with what is nearby

Within 50 km in a straight line. Ski areas in the same weather-model cell (about 30 km across) get the same figure.

Ski areaDistanceSeasonal snowfallWorld rank
Nagaoka City Ski Area11.0 km320 cm404
Suhara Ski Area11.0 km538 cm71
Koide Ski Area12.0 km370 cm226
Yakushi Ski Area13.0 km532 cm72
Hakkai Sanroku Ski Area19.0 km451 cm107

Compare side by side with Nagaoka City Ski Area and Suhara Ski Area →

Runs and lifts

Counted from the runs and lifts drawn on OpenStreetMap, within the boundary of the ski area. These are not the resort’s own published figures.

Marked runs
4
Run length
1.7km
Lifts
1
Vertical
130m
Top 437 m · base 307 m

Run map

EasyIntermediate Lift
North is up. Runs are coloured by difficulty; black lines are lifts.
Run map

Drag to move around, and use + and − to zoom. On a phone, swipe to move and pinch to zoom in further.

Slope shape, difficulty and lift types

The shape of the mountain

Longest run on the map0.8 km
Steepest pitch22°measured over at least 30 m
Average gradient of the runs11.8°

Which way the slopes face

North 18%
East 76%
South 6%
West 0%

94% of the vertical on the runs descends to the north or east. Those slopes get the least sun, so the snow lasts longer.

By difficulty

Easy 2 · 1 km
Intermediate 2 · 0.7 km

Lift types

  • Chairlift1

See past trail maps on Skimap.org ↗

Source: OpenSkiMap (© OpenStreetMap contributors, ODbL 1.0). How finely ski areas are drawn varies by region, so treat the counts as indicative. Vertical is the difference between the highest and lowest points of the mapped runs and lifts.

When it falls, and how winters differ

Month by month

The most snow falls in January. March brings 25% of January’s snowfall. That is a steeper fall than the median for ski areas in Japan (52%): the snow here is concentrated early in the season. In amount, March brings 41 cm, about the same as the median of 46 cm.

118cm
Dec
164cm
Jan
111cm
Feb
41cm
Mar
Average snowfall by month, last 12 winters

Winter by winter

Across the 12 winters measured, the average is 433 cm, and 7 of them fell short of it. The leanest was 2019/20 with 170 cm; the biggest was 2014/15 with 676 cm (4.0 times as much). For 63% of the 397 ski areas in Japan the leanest winter was 2015/16; here it was a different one.

676
366
456
413
321
170
423
513
387
384
623
466
14/1515/1616/1717/1818/1919/2020/2121/2222/2323/2424/2525/26

Snowfall each winter (December–March total). The dashed line is the average; the numbers mark the leanest and the biggest winter.

How these figures are made

Live cameras

This ski area does not put a camera on its own slopes. The nearest live view is the road below.

Footage remains the copyright of each operator. JAPANSNOWLINE neither stores nor redistributes it.

Hot springs nearby, as analysed

1 hot spring sources with published analyses lie within 5 km of this ski area, nearest first (the hottest is 13 °C).

Show the sources
SourceDistanceTemperatureType
小栗山鉱泉小千谷鉱泉?3.7 km13℃ coldsimple

These are analyses of hot spring sources, not a list of baths you can visit. They date from 1910 to 2005, many from decades ago, so today’s temperature and chemistry may differ. Names are as recorded in Japanese. Temperature and pH bands follow Japan’s standard for analysing hot springs.

Source: processed from the hot spring analysis data in the Geothermal Information Database (GRES-DB), Geological Survey of Japan, AIST

Worth seeing nearby

Within 20 km in a straight line, nearest first. Some lie over a pass that is closed in winter.

Show the list
PlaceTypeDistance
Uonuma Shrine魚沼神社Shrine8.7 km
Niigata Prefectural Road Route 50新潟県道50号小出奥只見線Landmark11.5 km
City Hall Plaza Ao-re Nagaoka長岡市シティホールプラザアオーレ長岡Landmark14.8 km
Nagaoka Station長岡駅Landmark14.8 km
Nagaoka Castle長岡城Historic site14.9 km
Echigo Hillside Park国営越後丘陵公園Park17.1 km

Chosen from the places most read about on Wikipedia, favouring those with an English article. Based on the Japanese Wikipedia lists of sights in each prefecture, as compiled in travel-log-data (CC BY-SA 4.0). English names from Wikidata (CC0). The content of this section is available under CC BY-SA 4.0.

Map

The weather map, and where it sits among nearby ski areas.

Official piste map ↗

Getting there

By car
about 25 minutes from Nagaoka-Minami-Koshiji Smart IC or Ojiya IC, or about 20 minutes from Horinouchi IC (all Kan-Etsu Expressway); about 45 minutes from Nakanoshima-Mitsuke IC (Hokuriku Expressway)

Source: city.nagaoka.niigata.jp · checked 1 Nov 2026. Shuttle days and times change with the season; check the official site before you go.

Going with children

Kids’ area
Yes (details in Japanese on the official site)
Childcare
Not checked
Parking
Not checked
Rental
Yes (details in Japanese on the official site)

Checked on the official site (21 Oct 2026) · Source. “Not checked” means we have not looked yet. Compare with other ski areas →

Places to stay nearbyPR

Contains advertising. Property names and Rakuten Travel’s booking pages are in Japanese.

8 properties on Rakuten Travel lie within about 3 km of this ski area. The table shows the nearest 8 with a listed price.

Property (links to Rakuten Travel)Lowest listed (per person, tax incl.)RatingDistanceGetting there
蓬平温泉 花の宿 よもやま舘 ¥15,4004.70/5 197 reviews5.3 km・南越路スマートICより県道蓬平温泉方面へ約20分 ・長岡ICより国道8号線バイパス、途中県道蓬平温泉方面へ(約40分)
ホテルサンローラ<新潟県長岡市> ¥3,0004.39/5 243 reviews5.6 km越後川口ICより車で10分!JR越後川口駅より車で5分!長岡市街・十日町・魚沼方面へのアクセス良好!駐車場は無料です。
よもぎひら温泉 和泉屋 ¥17,6004.61/5 349 reviews5.7 km長岡駅よりお車にて25分
蓬平温泉 蓬莱館 福引屋 ¥3,5004.04/5 174 reviews5.8 km長岡南越路スマートICよりお車で約20分/長岡ICよりお車で約30分/長岡駅からお車で約25分/長岡駅より送迎有・要予約
L-Stay小千谷 ¥3,9604.57/5 49 reviews7.3 km関越自動車道小千谷ICよりお車で約7分、小千谷駅より約4分、徒歩で約23分
ビジネスホテル ニュープラザ ¥6,0504.03/5 426 reviews7.8 kmJR上越線・小千谷駅より車で5分/関越道・小千谷ICより車で5分/関越道・川口ICより車で10分
Pick dates and guests to check rooms on Rakuten Travel

Prices are the lowest Rakuten Travel lists; a property name, or “Pick dates and guests” above, shows prices and rooms for your dates.

Contains advertising. Property names and Rakuten Travel’s booking pages are in Japanese. · Property data by Rakuten Travel (Supported by Rakuten Developers)

Places to stay on the map

5 places within 12 km of the slopes, as mapped on OpenStreetMap, many of them small inns and pensions. Many are not on booking sites — open the name for the website or the map.

Nearest: 5.5 km

Show the nearest places

Nearest first

Accommodation data: OpenStreetMap

Other booking sites: Booking.com ↗ · Agoda ↗ · Rakuten Travelad ↗

“ad” marks links that pay us a commission if you book. Links without it are not affiliated.

Guides covering Niigata

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