Above is the entrance of the mine run by one of the biggest congromaritein Japan Sumitomo Group before. It produced thousands of millions of copper and other kinds of metal but abolished.
The shaft and gallery of the abolished mine in the suburb of Shimokawa Town are still keeping the waterflow that contains acidic and poisonous substance.
They should be treated and mitigated before going into the river. The company that had run the mine must do that or let its subsidiary, getting the subsidies from the prefectural government and central.
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