Here's a bit of history from last year that I failed to share at the time. The coal mine played an important role in Japan's industrial history and its story is the story of the positive and negative aspects of that history. During the war years, Korean and Chinese people were forced to work there and many did not survive. Here's a link to a Japanese-language article about memorials to those victims that can be found at Shohoji, a temple in Arao:
http://asianews.seesaa.net/article/450517107.html
-- Kirk
https://mainichi.jp/english/articles/20201110/p2a/00m/0na/017000c
Cenotaph with names of 458 victims of Japan's 1963 coal mine explosion unveiled - The Mainichi
OMUTA, Fukuoka -- People including the families of victims of the 1963 deadly explosion at the Mikawa Pit of the Mitsui Miike Coal Mine attended a cer