At a glance
Experience panoramic views of mystical Lake Mashu from this less-visited observation deck in Hokkaido's Kiyosato town. The free viewing platform offers unique perspectives of the lake's misty surface and surrounding mountains, with complimentary parking and basic visitor facilities available.
Photographs
Uramashu Observatory
On the eastern rim of Lake Mashu, the Uramashu Observatory offers an intimate and less-crowded perspective of Hokkaido's mystical crater lake. The observation deck provides unique views of the lake's small island and crystal-clear waters, particularly stunning during clear morning hours when the legendary "Mashu Blue" is most visible.
Thick forest embraces the wooden deck, framing your view of the cobalt water and the small island of Kamuishu rising as a lava dome at the lake’s center. To the left (southeast), the volcanic cone of Camuinupuri (Mt. Mashu), mountain of the gods, rises dramatically, its slopes revealing the ancient eruptions that shaped this caldera lake over ten thousand years ago.
In summer and early autumn, when leaves are full, views may be slightly obscured by foliage, but that same greenery reflects vibrantly in the lake below. In spring or early summer, before full bloom, you’ll find clearer sight-lines through the bare branches. The recently rebuilt wooden viewing platform is tiered to improve lake sight-lines and includes multilingual QR-code audio guides.
The atmosphere here is peaceful. Visitors often pause quietly, seated on benches overlooking the lake with only the sound of wind through the trees. Compared to the busier 1st and 3rd observatories, this spot feels tucked away, maybe a little hidden, but that’s part of its charm. There’s free parking (about 15 cars), basic toilets, and a small summer-season resthouse with souvenirs, but no food vendors, so plan accordingly. In summer, bring insect repellent. Mosquitoes and small bugs can be noticeable.
Do note the observatory is seasonal, open from late April to end of October or early November. During winter, heavy snowfall closes the access road and facilities. Also, restroom facilities may not always provide essentials like toilet paper or soap, especially in remote settings, so carry your own supplies if needed.
Before you go
Entry is free and parking is free too for about 15 cars and even accommodates motorcycles and bicycles. Basic summer‑season toilets are available, but expect no paper or soap bring your own if needed. Wear sturdy shoes: the wooden platform and adjacent trail may be damp. Mosquito repellent is wise in summer. English signage is limited; QR‑guided audio helps. Tripods are allowed but use them considerately around other visitors.
Normally open from late April through early November. Closed in winter due to snow—typically November through early April. Even when parking is technically accessible, restrooms and the rest area remain closed.
When to go
Early morning visits in autumn offer the clearest views of Lake Mashu, with minimal fog and stunning fall colors. Summer brings lush greenery, though trees can partially obstruct views, while spring offers crisp visibility with fewer crowds after the winter closure. Visit before 10 AM to catch the best morning light and avoid afternoon backlight that can affect photography. Weekday mornings typically offer the most serene experience with fewer tourists and better chances of clear weather.
Public review summary
Visitors consistently praise the serene atmosphere and lack of crowds compared to other Lake Mashu viewpoints. The panoramic views receive high marks when weather permits, though overgrown trees partially obstruct some vantage points. While the observation deck offers unique perspectives of the lake, the facilities receive mixed feedback, with particular notes about limited parking and lack of toilet paper. Summer visitors mention issues with insects, while clear autumn days offer optimal viewing conditions.
What you'll find here
Location & access
- DirectionsAddress
Kiyosato, Shari District, Hokkaido 088-3461, Japan
- How to get there
By Public Transportation: From JR Midori Station (緑駅) on the Senmō Main Line in Kiyosato, take a taxi or drive approximately 20 minutes by car to reach Uramashu Observatory. Please note that snow may remain on the road until May, so exercise caution if visiting early in the season . There is no direct bus service to the site.
By Car: From JR Midori Station, it’s about 20 minutes by car to the observatory. You can also reach it via the Ura‑Mashu Scenic Drive from Mashu Onsen or Kiyosato, passing Kaminoko‑ike Pond. Be cautious—snow may remain on the roads until May.
Common questions
Is there parking available at Uramashu Observatory?
Yes, there is a free parking lot available on-site. While the lot is not particularly large, most visitors don't stay long so spots tend to become available regularly. During peak times, some visitors may need to park along the roadside.
What's the best way to avoid the fog at Lake Mashu?
While fog is a common occurrence at Lake Mashu, the Uramashu Observatory tends to have clearer views due to its lower elevation. Morning visits typically offer better visibility, and the location experiences less fog than the main observation points.
Are there facilities available at the observatory?
There is a small visitor center with a shop and public restrooms. However, note that restrooms do not provide toilet paper, so visitors should bring their own. The facilities may be closed during winter months.
Can I visit Uramashu Observatory in winter?
The road to Uramashu Observatory is closed during winter months, making it inaccessible. The site is typically only accessible during non-winter seasons when road conditions permit safe travel.
Are there hiking trails near the observatory?
Yes, there is an East Trail that begins from the left side of the observation deck. The trail leads to another observation point and continues along the volcano's outer rim, though proper trekking equipment is required for safety.
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