Ashi yu (Hokkaido)


Free bathing 24 hours per day!
Clothes can be kept on
Home page (basic information available anyway in Japanese)
Phone : 01548-3-2255
Adress : 088-3465
Maps : Mapfan - Google

Number of baths









Spring information

Water type : sulfur
Main spring : pH=1.3
Bath Temp : 40-43°C

Onsen in Hokkaido

Ashi yu (Kawayu Onsen)
Hotel New yu no kaku (Kawayu Onsen)
Onneto yu no taki (Onneto)
Tennen yukoro onsen (Niseko Hirafu)
Yamada onsen hotel (Niseko Hirafu)
Daiichi (Yoroshi Onsen)
Karamatsu no yu (Yoroshi Onsen)
Kotan (Lake Kussharo)
Sunayu (Lake Kussharo)
Wakoto Onsen (Lake Kussharo)
Sandan no yu - Takimi no yu (Iwaobetsu Onsen)
Kuma no yu (Rausu)

A popular place among local people


(explanation on symbols)

Ratings   (explanation of our rating system)

Global rating :    
It was difficult to decide whether to put this onsen in the database or not... as it is only a bath for feet! But considering its very peculiar water - an extremely acid one with a ph = 1.3 (the most acid one we have seen so far) and its central location in Kawayu Onsen, we decided it was worth figuring in this database! Visitors just remove the shoes and put their feet in the water. You won't however leave them inside for a long time, as after a couple of minutes, they will become really red, due to both the acidity... and the temperature.

Size :   
A small bath, but more than 10 people can seat around it at the same time.

View :   
Anyway... you probably will just keep watching the color of your feet.

Modesty :      

Area :      
Lake Kussharo is a beautiful caldera lake located in Akan National Park. With a circumference of 57 kilometers (maximum depth of 118 meters), it is the 5th largest lake in Japan. The Wakoto peninsula is one of the nicest place around the lake, with one free rotenburo). Boat, canoes and kayaks can be rented, and are popular in summer. In winter, the lake might freeze. Close to Lake Kussharo, the town of Kawayu Onsen is a typical uninspiring japanese onsen town, which lacks the beautiful view of the nearby lake. Mt. Iou can easily be reached, and is an active 500 meters high volcano, where acid smokes and solid sulfur can be observed. Finally, the most attractive place of the area is probably Lake Mashu, a beautiful and mysterious lake with a tiny island, where Ainu gods were supposed to live; This island rises 230 meters from the bottom of the lake. The shore of the lake is kept completely wild, and only three observatory points are available. Be aware that most of the days, the lake can be hidden from the viewers by a very dense fog.

   Visit the Secret Japan forum for a guide of Akan National Park


Because of the extreme acidity - and high temperature - of the water, do not expect to keep your legs for a long time in this mixture... Indeed, after just three minutes, my legs started to become red and to burn, which prompt me to exit the bath as quickly as possible; local people were laughing, but none of them stayed in the water for more than five minutes!



Feet get quickly burn by the temperature and the acidity of the water