 Mitsubishi's industrial production in the city was also severed by the attack; the dockyard would have produced at 80 percent of its full capacity within three to four months, the steelworks would have required a year to get back to substantial production, the electric works would have resumed some production within two months and been back at capacity within six months, and the arms plant would have required 15 months to return to 60 to 70 percent of former capacity.The Mitsubishi-Urakami Ordnance Works was the factory that manufactured the type 91 torpedoes released in the attack on Pearl Harbor; it was destroyed in the blast.The second atomic bombing, on Nagasaki, came only three days after the bombing of Hiroshima, when the devastation at Hiroshima had yet to be fully comprehended by the Japanese.