A US war with Japan? Only in 'Captain America'

Rare minerals fight: The in-universe explanation of the conflict in ‘Captain America: Brave New World’ has to do with the discovery of a new element, adamantium. — Marvel

IN Walt Disney’s latest Marvel movie, the US is on the brink of war. Not with China, Russia, or even North Korea – but with Japan. 

Wait, Japan? Its closest security partner in Asia, one that depends on its security alliance with the US?