Masutomi formed about 10 million years ago by the land rising. Therefore, the earth contains a lot of underground minerals such as Radium, Potassium and Germanium. Onsen contains a lot of those metals. The temperature of the Onsen Spring is very low (30 Celsius). People enjoy warm Onsen for long time. Because this Onsen water is good for livers, people who has tatoo can enjoy Onsen.

Mt. Mizugaki
Mt. Mizugaki is one of 100 best Japanese mountain. It has a very unique peak made from rocks. The top is 2230m tall. There is a open field under the mountain where is a great place for relaxing and wellness execise.

Akagawa River
The water of Akagawa River is chosen as 100 best Heisei Water. It contains radiative metals.
Wellness execise: Stand in the water for 10 min. All those Radium, Potassium and Germanium will penetrate from the bare feet.

Masutomi Onsen
It is Radiative Onsen. The temperature is very low (30 C). There are 4 different temperature of Onsen so that people can stay in Onsen longer. It is recommended to stay for 30 to 60 min.

Organic Vegetable are also very famous and healthy in Masutomi.