Japan has spent years casting the International Criminal Court as a pillar of the rules-based order. This week, its closest ally sanctioned the Japanese judge who leads it. The move has left Tokyo in an uncomfortable bind: defend Tomoko Akane, the Japanese president of The Hague-based court, and risk antagonising US leader Donald Trump, or temper its criticism and appear weak in the face of an attack on an institution central to Japan’s rule-of-law diplomacy. Washington’s sanctions, announced on...