The head of a Japanese IT firm has said that he created videos criticising rivals of Prime Minister Sanae Takaichi in last year’s ruling Liberal Democratic Party (LDP) presidential race, after being asked by one of her aides to help her win the election. Ken Matsui, 33, said in a recent online interview that he was consulted by a secretary of Takaichi on how to “reverse” the lead of Shinjiro Koizumi, then a strong contender to win the LDP presidential election in October. “I proposed that...