Japan is the only non-nuclear-weapon state with a program to extract plutonium from the spent fuel produced in nuclear reactors—a process termed reprocessing—to fabricate more fuel. Because plutonium can be used directly in the manufacturing of nuclear weapons, Japan has, in keeping with internationally recognized best practice, pledged not to produce more plutonium than it can consume. Serious questions are emerging, however, about whether it can uphold this commitment. Continue Reading