Japan is monitoring foreign exchange moves with a sense of urgency and will consider "all options available" if yen moves become volatile, the country's top currency diplomat, Masato Kanda, said Friday after the Japanese unit plunged relative to the U.S. dollar.The dollar jumped by more than 1.5 yen in about an hour Friday, edging close to the 142 yen line at one point, as market participants apparently pared back expectations of a policy tweak by the Bank of Japan at the July 27-28 meeting on media reports the central bank would stand pat on policy.Reuters reported Friday that the BOJ will…READ FULL ARTICLE