Shikoku, southwest of Honshu
Shikoku is one of Japan’s four main islands and lies southwest of Honshu. It consists of four prefectures: Tokushima, Kagawa, Ehime, and Kochi.
The Seto Inland Sea lies to the north and the Pacific Ocean to the south, with mountains extending through the center of the island.
Explore Shikoku on the map and look for hot springs with me.
Explore the hot springs of Shikoku on the map
Select a ♨ marker to see information such as the hot spring or source name, recorded area, temperature at the time of investigation, pH, and sampling date.
You can also search by hot spring name, source name, or municipality using text, or use the microphone button to search by voice.
Start with a place you would like to visit or an area that interests you.
About the map data
The ♨ markers represent historical records included in AIST’s Hot Spring Chemical Analysis Data. They are not a list of hot spring facilities currently in operation, and the dates of investigation vary by location.
A place without a marker does not necessarily have no hot springs. Each marker shows an approximate location and does not indicate the exact site of a spring or the entrance to a facility.
The displayed temperature was measured at the source and may differ from the temperature of the water in a bathing pool. The pH value is only a guide to acidity or alkalinity. Temperature and pH alone cannot determine a hot spring’s type or therapeutic effects.
How many hot springs are there in Shikoku?
According to the Ministry of the Environment, Shikoku has 127 hot spring areas and 570 hot spring sources. Together, they discharge 37,889 liters of water per minute.
The number of hot spring areas and the number of sources are not the same. A single hot spring area may contain multiple sources.
The number of hot spring areas and sources in Shikoku was lower than I had expected.
What I noticed while making the map
On the Shikoku map, the number of hot spring markers appears low overall.
Among the four prefectures, the concentration of markers in Ehime caught my attention.
Comparing the prefectures reveals differences in the distribution of hot spring records. Zoom in and take a closer look at each prefecture.
Why not explore the map to find a hot spring in Shikoku that you would like to visit?
Japan / Chugoku / Kyushu and Okinawa
Sources: Ministry of the Environment, Hot Spring Use in Fiscal 2024 (data as of March 31, 2025); Geological Survey of Japan, AIST, Geothermal Resources of Japan: Hot Spring Chemical Analysis Data (published in 2020)
The data card uses Ministry of the Environment statistics, while the ♨ markers use AIST’s historical analysis records. The scope, reference date, and counting method differ, so the figures are not expected to match. Before visiting, check the facility’s or local government’s official information for its current location and operating status.