NEW : Kerry says Japan , U.S. ready to work with North Korea to resolve tensions . Kerry 's visit to Japan is the last stop in his Asia tour . North Korea tells him to ` ` stop recklessly " for " a comeback on Korea '' Kerry : China and the West call on Pyongyang to refrain from provocative actions .
NEW : Kerry says Japan , U.S. ready to work with North Korea to resolve tensions . Kerry 's visit to Japan is the last stop in his Asia tour . North Korea tells Tokyo to `` stop recklessly working for staging a comeback on Korea '' Kerry : China and the U.S. call on Pyongyang to refrain from provocative steps .