Japan’s modified Izumo-class destroyers JS Kaga and JS Izumo are now operating as light aircraft carriers for the U.S.-built F-35B Lightning II — Tokyo’s first carriers since World War II. The 27,000-ton ships carry up to 12 stealth fighters each from an 814-foot flight deck. The Kaga’s namesake was sunk by American dive bombers at Midway in 1942. Eighty-four years later, the new Kaga gives Japan stealth-air power projection across the Pacific t…