The 100,000-ton US Navy supercarrier ‘Ronald Reagan’ has conducted drills with Japanese warships south of the Korean Peninsula, Japan's military said. Pyongyang, meanwhile, has threatened a further “hydrogen bomb test” over the Pacific. The Japan Maritime Self Defense Force said in a statement on Friday that the Nimitz-class nuclear-powered supercarrier ‘Ronald Reagan,’ based in the Japanese town of Yokosuka, Kanagawa Prefecture, and its escort ships have been holding drills with Japanese Navy vessels in waters south and west of Japan's main islands since September 11. The strike group is also set to stage a separate drill with the South Korean Navy in October, the Defense Ministry added. The large-scale drill will involve three Japanese warships, including two destroyers and one of the country's two biggest helicopter carriers, and will run until the end of the month. On Friday, North Korean Foreign Minister Ri Yong-ho said that Pyongyang is