When Japanese Prime Minister Shigeru Ishiba announced on September 7 that he would step down after his party was trounced at the parliamentary polls earlier this year, the country was already staring at what could be an era of flux, marked by revolving door leaders who are slaves to approval ratings amid relentless electoral cycles.And this trend, according to observers, is likely to persist, pulling Tokyo into a period reminiscent of the 1990s and 2000s when prime ministers were replaced...