Welcome to The Adversarial. Every other week, we’ll provide you with expert analysis on America’s greatest challengers: China, Russia, Iran, North Korea, and jihadists. Read more below.***ChinaOn Oct. 27, Japan held snap elections for its Lower House, which have brought about a more uncertain era in Japanese politics and some potential openings for China. For the last decade, the Liberal Democratic Party and its junior coalition partner Komeito have adjusted Japan’s approach to security by taking a harder line on China. But having lost their Lower House majority, they or the Constitutional Democratic Party will have to form an unwieldy