The 67-year-old Shigeru Ishiba will become Japan’s new prime minister on 1 October after winning a surprisingly exciting play-off vote against his rival Sanae Takaichi. For a moment it looked as if Japanese MPs were set to elect the country’s first female leader (Takaichi was ahead of Ishiba in the first round of voting) but in the end the Liberal Democratic party (LDP) opted for experience and former defence minister Ishiba’s safe, and crucially clean pair of hands.