We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.
We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.
New! Find and book your ideal hotel on TripAdvisor — and get the lowest prices
Map
Satellite
Map updates are paused. Zoom in to see updated info.
Reset zoom
Updating Map...
Get directions
Address: Teshikaga-cho, Kawakami-gun, Teshikaga-cho 088-3200 , Hokkaido
Phone Number: +81 15-482-2191
Website

TripAdvisor Reviewer Highlights

Read all 286 reviews
Visitor rating
  • 13
    Excellent
  • 10
    Very good
  • 3
    Average
  • 0
    Poor
  • 0
    Terrible
Part of the geological picture of Hokkaido

This is an essential piece in the fascinating trail of National Parks which highlight different elements of Japan's volcanic origins. It is relatively rare to get up this close... read more

4 of 5 bubblesReviewed 3 weeks ago
GraftonRiverguide
,
Grafton, Australia
Add Photo Write a Review
Turn Your Opinions into Points!
Turn your opinions into JPMiles
Turn your opinions into PAYBACK Points
*You can enroll in only one programme at a time to earn rewards for reviews.
JPMiles / Payback Arrow
JPMiles / PAYBACK
50

286 Reviews from our TripAdvisor Community

Traveller rating
Traveller type
Time of year
Language
  • More
Showing 26: English reviews
Edinburgh, United Kingdom
Level Contributor
271 reviews
71 attraction reviews
common_n_attraction_reviews_1bd8 139 helpful votes
5 of 5 bubbles Reviewed 3 weeks ago

Loved this place. Steam roars from the ground. It reeks of sulphur. Nice visitor centre with good coffee and a very good shop. Sure, it's a bit touristy, but what a great place to see geology writ large.

Helpful?
Thank Heidbummer
Grafton, Australia
Level Contributor
308 reviews
104 attraction reviews
common_n_attraction_reviews_1bd8 87 helpful votes
4 of 5 bubbles Reviewed 3 weeks ago

This is an essential piece in the fascinating trail of National Parks which highlight different elements of Japan's volcanic origins. It is relatively rare to get up this close and personal to ongoing volcanic activity and the venting steam and sulphurous deposits are fascinating. No-one with any interest in how the landscape has been shaped could fail to be impressed... More 

Helpful?
Thank GraftonRiverguide
Level Contributor
4 reviews
5 of 5 bubbles Reviewed 5 weeks ago

Very easy little walk to see the unique steaming sulphurous .emissions. Very colorful and steamy! Lots of tourists,

Helpful?
Thank Aaftab J
Normal, Illinois
Level Contributor
470 reviews
229 attraction reviews
common_n_attraction_reviews_1bd8 178 helpful votes
5 of 5 bubbles Reviewed 10 October 2016

Mountain spewing hydrogen sulfide and depositing yellow sulfur on rocks. Due to the heat the area is barren with no vegetation on site. As the warm water spring flow downhill it is used as spa. Do not miss the free hot foot public pool at the next town. Hydrogen sulfide gives a strong odor of rotten egg and your nose... More 

Helpful?
Thank nen f
Level Contributor
53 reviews
23 attraction reviews
common_n_attraction_reviews_1bd8 47 helpful votes
5 of 5 bubbles Reviewed 14 August 2016 via mobile

Mt Io or Io-zan is a spectacular sight! Smoke fumes coming up from between the rocks, rocks coloured yellow of the sulphite, the smell of rotten eggs, boiling hot water springing up! Great and impressive. You can come really close and feel yourself the heat and steam at one point! Must see. Will take about 30-40 minutes. Car park is... More 

Helpful?
Thank JackoV1
Singapore
Level Contributor
26 reviews
18 attraction reviews
common_n_attraction_reviews_1bd8 2 helpful votes
4 of 5 bubbles Reviewed 30 July 2016

A visit to Akan Natiinal Park will not be complete without visiting the volcanic Mt. Iou. You can see the steam spewing out from the mountain. There are lots of little craters that dot the mountain side, each one bubbling with hot gas and steam. The vegeratation looks desolate, and it looks a bit like being on the set of... More 

Helpful?
Thank Lani C
Ghent, Belgium
Level Contributor
8 reviews
5 attraction reviews
5 of 5 bubbles Reviewed 25 April 2016

I followed the nature trail from the Kawayu Eco Centre to Mount Io. It was a nice walk. Mount Iouzan impressed me. There were nice sulphur holes in the ground and steam was coming out of the cracks. Impressive!

Helpful?
Thank Ronin-Kris
Singapore, Singapore
Level Contributor
45 reviews
26 attraction reviews
common_n_attraction_reviews_1bd8 17 helpful votes
3 of 5 bubbles Reviewed 30 March 2016 via mobile

This Iouzan a different from what I have seen in Kyushu and Noboribetsu. First, this one is easier to walk compare with the rest. Spaciousness making u wanted to walk nearer to see the loan popping up from the grounds. If u never see this kind of Iouzan, and also with kids and elderly tag along, this is quite a... More 

Helpful?
Thank jazzng2015
New Hyde Park, New York
Level Contributor
175 reviews
107 attraction reviews
common_n_attraction_reviews_1bd8 52 helpful votes
4 of 5 bubbles Reviewed 15 March 2016

I spent just an hour or so but still was able to see a very interesting landscape. The sulur on the rocks in the steam made for a pretty picture

Helpful?
Thank PGIT
Level Contributor
26 reviews
5 attraction reviews
common_n_attraction_reviews_1bd8 15 helpful votes
5 of 5 bubbles Reviewed 3 March 2016

Beautiful hot spring mountain! An amazing sight of snow and boiling hot water in the sulphur pool, with steam fabricating the beautiful scenery. Don't forget to try out the onsen tamago (Hard boiled egg cooked in hot spring!).

Helpful?
Thank jiaaqi

Travellers who viewed Iouzan also viewed

Teshikaga-cho, Kawakami-gun
Teshikaga-cho, Kawakami-gun
 
Teshikaga-cho, Kawakami-gun
Teshikaga-cho, Kawakami-gun
 

Been to Iouzan? Share your experiences!

Turn Your Opinions into Points!
Turn your opinions into JPMiles
Turn your opinions into PAYBACK Points
*You can enroll in only one programme at a time to earn rewards for reviews.
JPMiles / PAYBACK
50
JPMiles / Payback Arrow
Write a Review Add Photos & Videos

Questions & Answers

Here's what previous visitors have asked, with answers from representatives of Iouzan and other visitors
1 question
Ask a question
Questions? Get answers from Iouzan staff and past visitors.
Posting guidelines
Typical questions asked:
  • Do I have to buy a ticket for my infant?
  • How do I get there using public transportation?
  • Is there a restaurant or café onsite?