I have visited Hachijyo zima in Tokyo,and Tepco Hachijyojima-Geothermal Power Plant exists.
hachijyo island is a volcanic island and so people there enjoy this kind of energy.
However , in most area of Japan,we cannot make use of this kind of energy.
So perphaps it is important to go to the peculiar power stations when we were places where the power plants are.
In Japan, In Iwate prefecture , Shzukuishi Geothermal Plant and In Kyuushu area, Minamata Plant are.
Here is a photo of Geothrmal Power Station at Hachijyozima.