Sanae Takaichi is poised to make history as Japan’s first female prime minister, but her government may be imperilled before it even begins amid a deepening rift within the ruling coalition.The Liberal Democratic Party Takaichi now leads and its long-time junior partner, Komeito, have been in coalition for 26 years. Without Komeito’s parliamentary support, the LDP would lose its majority in the Diet, forcing its leader to seek new political allies.Yet analysts warn that Takaichi’s hardline...