Etuzan Jakusui Onozomi No Ketsumatsu

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In the aftermath of the disaster, various investigations and studies were conducted to try to determine the cause of the contamination. Some researchers suggested that the poisoning may have been the result of a natural phenomenon, such as the movement of underground water or the release of toxic gases from the earth's crust. Others proposed that human error or intentional contamination may have been to blame.

Here's a brief explanation and essay on the topic:

"Etuzan Jakusui Onozomi no Ketsumatsu"

Refers to the lush, green mountains of the Echizen region (the northern part of Fukui). It represents the "mountain side" of the prefecture’s identity.