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[Mt. Iou in Teshikaga] Active Earth Can Be felt

August 26th, 2014

Mt. Iou

Mt. Iou (硫黄山) is an active volcano with 512 m in height in Teshikaga town between Lake Mashu (摩周湖) and Lake Kussharo (屈斜路湖). In Akan Mashu National Park, here used to be a sulfur mine, so it has been called Mt. Iou. * The sulfur means "Iou" in Japanese language. But its true name is Mt. Atosanupuri (アトサヌプリ) that means "A naked mountain" in Ainu language. A lave dome was born from 1,000 to 1,500 years ago. There are more than 1,500 large and small fumaroles, and those still have been vomiting forth steam. A mysterious view with greenish brown and yellow ground changed colors by sulfur and native light brown ground can be seen, and it smells the sulfur like bad eggs in the air. Admission free. A parking lot is charged for JPY 500 in a summer. But the parking lot is free of charge in a winter.

Mt. Iou
Mt. Iou in Teshikaga

Movie of Mt. Iou

Iouzan Resthouse (硫黄山レストハウス), Tsutsujigahara Natural Trail (つつじケ原自然探勝路) and the parking lot are built on the site. As for the Iouzan Resthouse, a souvenir shop and a restroom are on the 1st floor, and Iouzan Nature Hall (硫黄山ネイチャーホール) is on the 2nd floor. Onsen egg (温泉卵), a Mt. Iou specialty, is very popular. At the Iouzan Nature Hall, they explain about a history and a natural environment of the Mt. Atosanupuri. By the way, From here to Kawayu Onsen, the Tsutsujigahara Natural Trail with 2.8 km in total length is set, and visitors can observe Marsh Tea or Creeping Pines along the trail. The Marsh Tea is in full bloom from June to July. The winter Mt. Atosanupuri covered with snow has a good reputation, too.

Iouzan Resthouse
Mt. Iou in Teshikaga
Marsh Tea (Source: Wikipedia)
弟子屈の硫黄山
Onsen Egg (Source: Wikipedia)
弟子屈の硫黄山
Tsutsujigahara Natural Trail
Mt. Iou in Teshikaga
Dead Creeping Pines. Caused by Sulfur?
Mt. Iou in Teshikaga

The distance is around 3 km away from the Kawayu Onsen, and the Mt. Iou supplies hot spring facilities with hot springs. In addition, Iouyama Onsen (硫黄山温泉) is on the Mt. Iou, but it has been prohibited to enter the mountain because a fall of rocks caused some deaths and injuries. By the way, a restraunt, a cafe and a convenience store are not built around here. But the Kawayu Onsen has the restraunt, the cafe and the convenience store. Speaking of tasty restraunts in the Teshikaga, Teshikaga Ramen Head Office (弟子屈ラーメン 弟子屈総本店), Miraku Sushi (味楽寿司), Soba Doraku (そば道楽), Inakaya Genpei (いなか家 源平) and Cream Dowa (くりーむ童話) are popular in particular. I ate foods at the Teshikaga Ramen Head Office and Orchardgrass, and those were tasty.

Lake Mashu

Lake Mashu is a caldera lake in Teshikaga town located in the northeastern part of Lake Akan (阿寒湖), and means "A mountain god's lake" in Ainu language. The perimeter of the lake is about 19.8 km. The maximum water depth is 211 m. The lake is well-known as the 2nd clearest lake after Lake Baikal in the world, and does not has a river, But it is a mysterious lake that lake water level has barely changed if it rains. The Lake Mashu has much fog and a few sunny intervals, and it is called "Foggy Lake Mashu (霧の摩周湖)", too. 3 viewing points, the Mashu 1st Observation Deck, Mashu 3rd Observation Deck (摩周第三展望台), Uramashu Observation Deck (裏摩周展望台) are built on the cliff with 300 - 400 m in height from the surface of the lake around the Lake Mashu. By the way, Mashu 2nd Observation Deck (摩周第二展望台) used to be in old days, too, but it was not used, so it has disappeared. Article is here

Mt. Mashudake and Kamuisshu Island
Lake Mashu in Teshikaga

Lake Kussharo

Lake Kussharo (屈斜路湖), the largest caldera lake in Japan, is in Teshikaga town located in the northeastern part of Lake Akan (阿寒湖) and is the second largest caldera lake in the world, too. The perimeter of the lake is about 57 km. There is Nakajima island in the middle of the lake, but a landing is prohibited. The cracks called "Omiwatari (御神渡り * cracks that form in the ice on the Lake)" occur in a winter. Those are the largest size in the Japanese freshwater lake, and the ice cracks seem to occur for 10 km in total length and 2 m in height. In addition, it is famous as a wintering spot for whooper swan, and they rest their wings on the surface of the non-frozen water by hot springs melting. Article is here

Winter Lake Kussharo
Lake Kussharo

Kawayu Onsen

Kawayu Onsen (川湯温泉) is a famous hot-spring place in Teshikaga town located in the northern part of Kushiro city. There are Mt. Iou (硫黄山), Lake Kussharo (屈斜路湖) and Lake Mashu (摩周湖) around the Kawayu Onsen, and it is a base for sightseeing, and about 0.7 million tourists come every year. Ph of the hot springs is about 1.8, and the Kawayu Onsen is popular for great strong acidic hot springs in Japan together with Tamagawa Onsen in Akita prefecture, Kusatsu Onsen in Gunma prefecture, Zao Onsen in Yamagata prefecture and Sukayu Onsen in Aomori prefecture. They are proud of high quality hot springs, and chant "100% narutal free flowing hot springs" as a whole, and all the hot spring facilities use the 100% narutal free flowing hot springs. Article is here

Ikedaya
Kawayu Onsen in Teshikaga -Ikedaya-

Teshikaga Ramen

Teshikaga Ramen Head Office (弟子屈ラーメン総本店) is a popular ramen restraunt in Teshikaga town located in the northern part of Kushiro city and was founded in Sapporo city in 2003. However, they moved the head office to Teshikaga town to go back to basics. Underflow water of Lake Mashu was used to bring back taste of the Teshikaga ramen from the old day. Furthermore, Pork bones more than 3 times of the another ramen restraunts were cooked for 20 hours over a low heat. Article is here

Soy Sauce Broth Ramen with Seafood Flavor
Teshikaga Ramen

Orchardgrass

Orchardgrass (オーチャードグラス) is a restaurant at Kawayu-Onsen Station building in Teshikaga town located in the northern part of Kushiro city. The orchardgrass is a kind of a grass. After Kawayu-Onsen Station became an unmanned station, the Orchardgrass started a business in 1987. The station building is a wooden building built in 1930, and it has an atmosphere such as the Showa period. There is a footbath on the station building, too. Article is here

Soft-Boiled Egg on Hamburger Steak
Hamburg Steak -Orchardgrass in Teshikaga-

Foot of Mt. Iou

The magnificent Mt. Iou with a lot of steam can be seen at the foot of the mountain. Hikers used to be able to go up the mountaintop, but it has been prohibited to enter the mountain because a fall of rocks caused some deaths and injuries. Fences are built at the foot of the mountain, so only a limited range can be observed. But a lot of the fumaroles are there and here, and can be seen up close relatively. Please feel a feeling of the earth in the air.

広告

Mt. Iou from Roadside
Mt. Iou in Teshikaga
Mt. Iou
Mt. Iou in Teshikaga
Fumaroles (Source: Wikipedia)
Mt. Iou in Teshikaga
Foot of Mt. Iou
Mt. Iou in Teshikaga
Foot of Mt. Iou
Mt. Iou in Teshikaga

Atmosphere of Mt. Iou Can Be Watched on Youtube

Movie of Mt. Iou

Admission fee Free of charge
Parking lot Pay parking lot is provided (100 Cars), Capacity for midsize vehicles: JPY 500. * Visitors can park their cars at the parking lot of Mashu 1st Observation Deck if they pay a fee.
Business hours 08:30-17:00
Regular closing day Winter season
Telephone number +81-15-483-2670
Home page Home page is here
Mapcode 731 713 826*32

List of Accommodations

Refer to following websites for the accommodations around the Mt. Iou. You can get information regarding online reviews and photos.

Yunokaku Ikedaya(湯の閣 池田屋)
Kawayu Daiichi Hotel SUIKAZURA(川湯第一ホテル 忍冬)
Meitonomori Hotel Kitafukuro(名湯の森ホテルきたふくろう)
Kinkiyu Hotel(お宿 欣喜湯)
Kokuminshukusha Hotel Kawayu Park(国民宿舎 ホテル川湯パーク)
Booking
Rakuten
Hotel Parkway(ホテルパークウェイ)
Kawayu Kanko Hotel(川湯観光ホテル)
KKR Kawayu(KKR川湯)
Booking
Rakuten
Asanebo(旅人宿 あさ寝坊)
Jalan
Rakuten
Cottage Loghouse Kawayu(コテージログハウス川湯)
Booking
Jalan
Hotel Kaiko(ホテル 開紘)
Booking
Jalan
Rakuten
Ezo Rider House(Ezo ライダーハウス)
Booking
Jalan
Rakuten
ARtINn Extra Cold Art Infectious Device(ARtINn 極寒藝術伝染装置)
Jalan
Rakuten
Booking.com

A page of Akan Mashu National Park is here

Akan Mashu National Park

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