Defense Minister Nobuo Kishi said Tuesday a joint Chinese and Russian naval flotilla seen recently around Japan displays an unprecedented "show of force" that underscores the growing list of security challenges in the region.Five Chinese ships and five Russian ships on Monday last week sailed together through the Tsugaru Strait between Hokkaido and Japan's main island of Honshu into the Pacific Ocean. On Saturday, they passed through the Osumi Strait south of Kyushu before continuing into the East China Sea."This is the first time we have confirmed activity on such a large scale and over su…READ FULL ARTICLE