Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Deputy Prime Minister of Japan the exercise of de facto, if not de jure, power. The current Deputy Prime Minister is Tarō Asō, who took the post on 26 December 2012. Deputy Prime Minister of Japan The is a senior member of the Cabinet of Japan. The office of the Deputy Prime Minister is not a permanent position, existing only at the discretion of the Prime Minister. Deputy prime minister possesses no special powers as such, though they will always have particular responsibilities in government. They do not automatically succeed the Prime Minister, should the latter be incapacitated or resign from the leadership of his