The abandoned industrial compound of Mandakoh had once operated for the largest coal mine ever existed in Japan. From its opening in 1899 to the closure of 1997, the contribution of this mine was significant, not only on early Japanese economy and exporting business but also, on industrialization and modernization of the nation. This memorial site here displays the magnetite of that today.

The premises were designated as an Important Cultural Property of Japan in 1998 and as a national historic site in 2000, and as a part of UNESCO World Cultural Heritage sites in 2015. The inside of the several compound buildings are currently open for public viewing.