Investors want assurance that fiscal policy will not make the central bank’s job harder. Defense policy added a second major theme. That makes the defense white paper part of the same political problem as the food-tax cut and the yen. The defense white paper strengthens the government’s security narrative, but it also raises new questions over funding and priorities. The defense white paper will shape debate over whether Japan’s military buildup is being framed as economic policy as well as national security policy.