Republican presidential front-runner Donald Trump said in a foreign-policy speech Wednesday that he would seek a “rebalancing of financial commitments” with U.S. allies in Asia, saying U.S. allies across the globe “are not paying their fair share.” Japan and South Korea are the two biggest recipients of U.S. resources in East Asia for different but overlapping reasons.

How much do the U.S. military bases in East Asia cost to operate, and what are the arguments for and against keeping them in place? Here are some questions...