1993-1994: Automatic dust filtration facility was installed in the fish farming water conduit, and automatic feeding devices were installed in the juvenile fish pond, adult fish pond and feeding pond.
1993年（平成5年）～1994年（平成6年）養魚用水路に自動除塵設備を整備し、稚魚池、親魚飼育池および餌付池に自動給餌機を設置。