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On December 27, 1938, a bubble avalanche of heavy snow hit a five-story dormitory building, which owner by Sato Kogyo construction company, where construct in Shigotani hydro-dam and hydroelectricity plant during 1936 to 1940.
This construction site is very difficult construction, caused by hot rock mining zone.
According to the Toyama Prefecture official confirmed report, 84 people died in 1938 case, and total number of 300 people lives during five years.
This dam and hydroelectricity plant was completed in November 1940.

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