Photo: 唐山健志郎 · Public domain · Wikimedia Commons

Futamata-Radium Onsen

Hokkaido · 二股ラヂウム温泉

Futamata-Radium Onsen is a hot spring town in Hokkaido, Japan. The water leaves the ground at 43°C, hot. It measures pH 7.1 — close to neutral. Officially the water is classed as chloride spring and radioactive spring. 1 inns take visitors here.

Chloride springRadioactive spring

The water here

Chloride spring 塩化物泉

Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.

Radioactive spring 放射能泉

Contains trace radon that leaves the water quickly. Also called radium or radon springs.

The numbers

Water temperature
43°C
pH
7.1 (close to neutral)
Inns
1
Address in Japanese
山越郡 / border|25px 長万部町字大峯32

Figures from the town's Japanese Wikipedia article.

Where it is

42.5767, 140.2393 — open the map

Read more

Japanese Wikipedia

Other towns in Hokkaido

Noboribetsu OnsenHokkaido · 登別温泉
Chloride springBicarbonate springSulfate springIron springSulfur springRadioactive spring
Jōzankei OnsenHokkaido · 定山渓温泉
Chloride spring
豊富温泉Hokkaido
Chloride springBicarbonate springIodine spring
雷電温泉Hokkaido
Sulfate spring
濁川温泉Hokkaido
Chloride springBicarbonate springSulfur spring
カルルス温泉Hokkaido
Simple springSulfate spring
Kawayu Onsen (Hokkaido)Hokkaido · 川湯温泉
Bicarbonate springSulfate springAcidic springSulfur spring
Yunokawa OnsenHokkaido · 湯の川温泉
Chloride springCarbon dioxide spring

Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.