Japan's defence minister on Friday dismissed the navy chief and punished nearly 90 officials in the biggest house-cleaning in years after a string of scandals including a fatal naval accident..."We deeply apologise to the people. We will promptly and continually carry out effective measures to prevent a recurrence," Defence Minister Shigeru Ishiba told reporters as he announced the punishments. The dismissal of Admiral Eiji Yoshikawa will take effect on Monday. He will be replaced by Admiral Keiji Akahoshi, who currently heads the naval force's Sasebo district in southern Japan. The defence minister said that officers on the Atago lacked vigilance as they cruised back to Japan from Hawaii. "There was not adequate surveillance of the ship and the area around it," Ishiba said. "It is highly possible that the measures that the Atago took right before the collision were insufficient," he added.