Yubari Coal Mine Museum

Speaking of the city of coal industry in Japan, Miike coal mines, Chikushi coal mines in Kyushu and Hokkaido are Yubari coal mines.
Super power coal (black diamond) began here, and nearby coal mines were open up.
It is an experienced museum where you can enter.
Early hand carving era, era of mechanization.
However, in order to respond to demand, the battle against the risk of digging to the ground regardless of day and night (gas , falling etc).
Transformation of energy policy. History is coming down.