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Keywords from Image Description:
STORAGE REINFORCED CONCRETE CAVERN BUILT INTO THE SIDE OF HILL AT THE FORMER TOKYO ND ARMY ARSENAL. en OKUNOSHIMA JAPAN STORAGE REINFORCED CONCRETE CAVERN BUILT INTO THE SIDE OF HILL AT THE FORMER TOKYO ND ARMY ARSENAL RECESSED IN THE WALLS OF THE CAVERN FOUR ON EACH SIDE ARE GAS STORAGE TANKS EACH WITH CAPACITY OF TONS DOORWAY