There are over 40 separate hot spring sources available in many ryokans and public bath houses.

The Japanese name means "40 thousand" indicating that the baths cure many diseases.

[4] The Shima Onsen is assessible by way of a rocky dirt trail, that has been used by people to access the hot springs for four hundred years.

The Sekizen-kan Honkan, constructed in 1691, is one of the oldest inns to be found in Japan.

[2] Article contains translated text from 四万温泉 on the Japanese Wikipedia retrieved on 23 March 2017.