Ashinoyu Onsen — Spring Water Analysis, Temperature and Snowfall
芦之湯温泉 · Kanagawa
Ashinoyu Onsen (芦之湯温泉) is a nationally designated onsen town in Kanagawa. We measured how much snow its winters bring, using the same method as for the 3,069 ski areas on this site.
How this place came to be
A small basin at 875 m in southwestern Hakone, ringed by peaks around a thousand metres — Kamifutago, Komagatake, Takanosu, Maruyama. It lies on the Yuzaka road, the medieval route over the Hakone pass, and Kamakura-period documents already describe hot water rising here. With Yumoto, it is reckoned the oldest spa in Hakone.
In the Edo period it was one of the "seven baths of Hakone." Later a circuit of all seven, the shichito-meguri, became fashionable, and visitors came from across the southern Kanto. In the early 19th century Edo men of letters — Kamo no Mabuchi among them — gathered at Tokoan, a small hall in the grounds of the Kumano shrine, for poetry meetings. Tokoan was rebuilt in 2002.
Along the road from Ashinoyu to Shojin pond stand stone buddhas and pagodas carved in the 13th and 14th centuries. Several are Important Cultural Properties, including the graves attributed to the Soga brothers and Tora Gozen, the twenty-five bodhisattvas, and the Rokudo Jizo. Because they are scattered on both sides of Route 1, pedestrian underpasses were built at two of them.
The hamlet is about thirty households: three places to stay and one public bath. Of eleven sources, six are in use. It is the only neutral sulphur spring in Hakone.
Sources: 環境省 芦之湯温泉 国民保養温泉地計画書
Snowfall in winter
| Per season | 45 cm |
| Rank | 53 of 77 ranked onsen |
| Against the median of 77 | -73 cm median 118 cm |
| Winter to winter | 60 cm 14–74 cm, leanest to deepest of twelve |
Find a place to stay · Open in maps
"Find a place to stay" searches Rakuten Travel and contains advertising; we may earn a commission on bookings made through it. The snowfall figures and ranking are calculated independently of that.
We do not link to an official site. We have not verified URLs for all 79 towns, and guessing would send you somewhere wrong. They will be added once checked.
More places to look
Just the bath
Day passes for hot springs are sold through Asoview. Japanese only.
The list covers the whole prefecture — it cannot be narrowed to this town.
Hot springs nearby, as analysed
38 hot spring sources with published analyses lie within 3 km of the centre of this onsen town, nearest first.
| Source | Distance | Temperature | pH | Type | Analysed |
|---|---|---|---|---|---|
| 芦之湯温泉 | 0.2 km | 24.5℃ cold | 3.7 mildly acidic | — | 1993 |
| 芦之湯温泉 | 0.2 km | 77℃ hot | 7.9 mildly alkaline | sulphate | 1964 |
| 芦之湯温泉 | 0.2 km | 65.9℃ hot | 7.9 mildly alkaline | sulphate, bicarbonate | 1994 |
| 芦之湯温泉 | 0.2 km | 66.1℃ hot | 8.1 mildly alkaline | sulphate, bicarbonate | 1965 |
| 芦之湯温泉 | 0.2 km | 52.7℃ hot | 8 mildly alkaline | simple | — |
| 宮ノ下温泉 | 2.6 km | 94.2℃ hot | 8.5 alkaline | chloride | 1995 |
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
Places within 20 km of this onsen town, chosen from those most read about on Wikipedia, favouring places with an English Wikipedia article, and listed nearest first.
| Place | Type | Distance |
|---|---|---|
| Mount Hakone箱根山 | Mountain | 2.1 km |
| Hakone Shrine箱根神社 | Shrine | 2.3 km |
| Hakone Onsen箱根温泉 | Hot spring town | 2.8 km |
| Hakone Open-Air Museum箱根 彫刻の森美術館 | Museum | 2.9 km |
| Ōwakudani大涌谷 | Mountain | 3.2 km |
| Odawara Castle小田原城 | Historic site | 10.6 km |
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.
Ski areas nearby
Up to five within 40 km, straight-line, nearest first. Quality rank is out of the 397 Japanese ski areas.
| Ski area | Distance | Quality rank |
|---|---|---|
| Fujiyama Snow Resort Yeti | 26 km | 411 of 397 |
These snowfall figures are estimates
The snowfall shown here is an estimate produced by a weather model, not a record of what actually fell.
We compared it against 63 Japan Meteorological Agency weather stations to see how far off it is. On average it comes to about six tenths of the real figure — it runs low. And it runs low by different amounts in different places: some read barely a third of what was measured, others match almost exactly. Mountains tend to read lowest.
We tried scaling everything up by a fixed amount to correct for it. It barely helped, because the error differs from place to place.
So treat these numbers as a guide to roughly where somewhere sits, not a precise figure. There is no meaning in the gap between first and second, or between 30th and 35th. Large differences between regions are real and can be read as they are.
We considered correcting the figures against the observations. But this ranking covers 3,069 ski areas across ten countries, and only Japan can be checked against weather stations. Correcting Japan alone would lift Japanese resorts above the Alps and North America with nothing behind it. Every place here is measured the same way instead.
Where a nearby weather station can be used, we print what it actually recorded on that ski area's own page.