Owakudani
大涌谷
An active volcanic valley on the Hakone Ropeway, with sulfur vents, black eggs boiled in hot springs, and Mt. Fuji overhead on clear days
About Owakudani
Owakudani is a geothermal valley created by a volcanic eruption of Mt. Kamiyama approximately 3,000 years ago, and it is still active. The hillside vents sulfurous steam continuously, the ground is stained yellow with mineral deposits, and small streams of superheated water run down the slope. The most direct way to experience it is from the Hakone Ropeway gondola, which passes directly above the main vent fields: for about three minutes in each direction, the cable car floats over the yellow-and-white valley with Sagami Bay behind you and, on clear days, Mt. Fuji rising to the north. The ropeway station sits at the edge of the valley; the 700 m nature trail up into the vents opens only for booked guided walks. The black eggs (kuro-tamago) are boiled for about an hour in hot-spring pools up the slope, where minerals from the water cling to the porous shells and turn them black, then steamed and sent down to the shop by the station on their own small ropeway. They taste like any hard-boiled egg. A bag of four costs ¥500.
Essential Tips
Check the Hakone Ropeway website the morning of your visit. Volcanic alert level changes can close the ropeway and the Owakudani area with minimal notice
Black eggs (kuro-tamago) sell out in the afternoons on busy days. They are sold at the Kuro-tamago-kan shop by the observation deck. Buy within the first 15 minutes of arriving
Mt. Fuji is most visible from October through February on clear mornings. Summer visibility is poor most days due to humidity. Check forecasts the night before and plan the ropeway crossing for morning
The Hakone Free Pass (¥7,100 from Shinjuku for 2 days) covers the entire ropeway including Owakudani. Without a pass, ropeway fares add up quickly on the loop
The volcanic sulfur smell is strong outdoors. It is not harmful for a short visit but people with respiratory conditions should check with a doctor before extended exposure
The loop works clockwise: Hakone-Yumoto, railway to Gora, cable car to Sounzan, ropeway to Owakudani and Togendai, pirate ship to Moto-Hakone, bus back to Hakone-Yumoto
The ropeway gondola holds about 18 people. During peak autumn weekends, queues of 20-30 minutes form at both Sounzan and Owakudani. Start early (aim to board at Sounzan by 10 AM)
Don't Miss
Ropeway Crossing Over the Vents
The gondola from Sounzan to Owakudani and from Owakudani to Togendai passes directly over the main geothermal vent field. For approximately three minutes, the cable car floats over yellow-stained earth with steam rising from dozens of vents below. The visual is more striking in cold weather when the steam is dense, and on clear days Mt. Fuji sits above the ridge to the north. This ropeway section is included in the Hakone Free Pass and is the most concentrated 10-minute experience in Hakone.
Kuro-tamago (Black Eggs)
The eggs are boiled for about an hour in pools of hot-spring water at around 80°C, where minerals from the water cling to the porous shells and turn them black, then steamed for 15 minutes and sent down to the shop by the station on their own small ropeway. Taste: identical to a hard-boiled egg; the legend of added longevity (seven years per egg) is the attraction, not the flavor. Four eggs for ¥500, eaten at the outdoor tables with the vents steaming nearby.
Outdoor Observation Area
A short path from the ropeway station leads to an outdoor viewing platform at the edge of the volcanic field. The plume from the vents carries hydrogen sulphide, the rotten-egg smell that hangs over the whole area, and the visual of yellow mineral deposits against the gray volcanic rock and white steam is unlike anything on the standard Japan tourist circuit. The 700 m nature trail up to the vents opens only for booked guided walks: four a day of up to 30 people, ¥800 each, with helmets provided, cancelled when gas levels are high or the weather is bad.
What to Do Here
Ropeway Stop and Black Eggs
The standard approach: board the ropeway at Sounzan (after the Hakone Tozan cable car from Gora), ride 10 minutes over the valley, disembark at Owakudani. Walk to the outdoor observation deck, watch the vents, buy black eggs at the Kuro-tamago-kan shop, and eat them at the outdoor tables. Reboard the ropeway for the continuation via Ubako to Togendai and the pirate ship pier on Lake Ashi.
Tips:
- Black eggs sell out in the afternoons during peak season; buy as soon as you arrive
- The eggs come in bags of 4, so plan accordingly if you are traveling in a smaller group
- The outdoor observation area smells strongly of sulfur; this is normal and not harmful for a 30-45 minute visit
- Check volcanic alert status before going; the ropeway and crater area can close with short notice
- Mt. Fuji is visible to the north from the observation deck on clear days; the morning is clearer than the afternoon
Hakone Loop with Owakudani
The Hakone Loop is a multi-transport circuit that passes through Owakudani as its highest point. Take the Hakone Tozan Railway from Hakone-Yumoto to Gora, the cable car to Sounzan, the ropeway to Owakudani (disembark for 30-40 minutes), then continue by ropeway to Togendai on Lake Ashi. Board the pirate ship cruise to Moto-Hakone and end at Hakone Shrine on the lakeside. Return to Hakone-Yumoto by bus.
Tips:
- Clockwise from Hakone-Yumoto is the standard direction: railway and cable car in the morning, ropeway and pirate ship in the afternoon
- The Hakone Free Pass (¥7,100 from Shinjuku, 2 days) covers every transport link on the loop plus the pirate ship
- Owakudani is the highest and coolest point on the loop, so bring a layer even in summer
- If the ropeway is closed (volcanic activity), buses replace the gondola service to Togendai; the loop still works but the overhead vent views are lost
Plan Your Visit
Opening Hours
ropeway
9:00 AM – 5:00 PM February to November, 9:00 AM – 4:15 PM December and January (check the day's schedule)
observation
Outdoor observation area accessible when the ropeway is open
note
The Owakudani ropeway station and outdoor area can close temporarily when volcanic alert levels rise. Check the Hakone Ropeway website before visiting. Closures can be same-day with no advance warning.
Best Time to Visit
Clear mornings for Mt. Fuji views. Mt. Fuji is most visible October through February; summer haze hides it most days. The vent steam is most visible on cold days. Mid-morning before tour buses arrive from the pirate ships below.
Avoid:
Weekend afternoons, particularly during autumn foliage season (October-November). The ropeway can queue for 20-30 minutes at peak times.
Nearby
Hakone Shrine
Red torii gate in Lake Ashi, reached by the ropeway to Togendai and the sightseeing cruise across the lake to Moto-Hakone.
12 km
Togendai (Lake Ashi pier)
The ropeway terminal at Lake Ashi level, reached from Owakudani via Ubako. Pirate ship cruise departs from here.
6 km (by ropeway)
Hakone Open-Air Museum
Outdoor sculpture park near Chokoku-no-Mori Station. 30 minutes by bus from the Sounzan cable car area.
8 km
Sounzan
The ropeway starting point below Owakudani, connected to Gora by the Hakone Tozan Cable Car.
4 km (by ropeway)
Gallery
Owakudani: sulfur vents and mineral-stained ground on the Hakone caldera rim
The ropeway crossing: gondola directly over the active vent fields, Mt. Fuji visible in clear conditions
Kuro-tamago: black-shelled eggs boiled in the valley's hot springs, ¥500 for four
Clear winter morning: Mt. Fuji from the Owakudani observation deck
The vents: steam and hydrogen sulphide rise continuously, most visible on cold days
History
founding
Owakudani ('Great Boiling Valley') was created approximately 3,000 years ago by an eruption of Mt. Kamiyama, one of the peaks in the Hakone volcanic complex. The eruption triggered a debris avalanche that blocked the Hayakawa River valley and formed Lake Ashi. The geothermal activity at the site has been continuous since then, with the most recent escalation in volcanic activity occurring in 2015, when a new vent opened and the crater trail was closed for several years.
significance
Owakudani is part of Hakone Geopark, a network of volcanic features that make up the Hakone caldera. The geothermal zone is central to the Hakone experience and to the local hot spring (onsen) culture: the same volcanic heat that vents at Owakudani also heats the mineral springs that supply ryokans throughout the Hakone valley. The black eggs are one of the more memorable foods in Japan tied to a specific piece of geology.
name Origin
The valley used to be called Ojigoku (大地獄, 'Great Hell'). It was renamed Owakudani (大涌谷, 'Great Boiling Valley') ahead of a visit by Emperor Meiji and the Empress on August 5, 1873, and the new name stuck.
Getting There
Hakone Ropeway from Sounzan
Station: Sounzan Station (Hakone Tozan Cable Car terminal)
Walk: Ropeway station to observation area: 5 minutes
Reach Sounzan via: Hakone-Yumoto Station (Odakyu Hakone Line) → Hakone Tozan Railway to Gora (35 minutes) → Hakone Tozan Cable Car to Sounzan (10 minutes). Both the railway and cable car are included in the Hakone Free Pass. Owakudani is then 10 minutes by ropeway from Sounzan.
Hakone Ropeway from Togendai
Station: Togendai Station (Lake Ashi ropeway terminal)
Walk: Ropeway station to observation area: 5 minutes
Togendai is accessible by pirate ship from Moto-Hakone or Hakone-en. If doing the Hakone Loop counterclockwise (pirate ship first, ropeway second), board the ropeway at Togendai and ride up via Ubako to Owakudani.
Location
Owakudani, Hakone, Kanagawa 250-0631
Nearest: Gora Station (Hakone Tozan Railway) then Hakone Ropeway via Sounzan (Owakudani is a ropeway station, so no walking is needed. Board at Sounzan and ride 10 minutes to the Owakudani stop.)
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Owakudani