A 2016 video showing Sanae Takaichi, who is set to become Japan's first female PM, singing X Japan's rock anthem 'Rusty Nail' on a television karaoke show has resurfaced online. "I wish I could go out for karaoke, but I've been reining myself in these past years," the 64-year-old said earlier. Notably, Takaichi was also once a heavy metal drummer.