Japan stands ready to take appropriate steps against volatile yen moves at "any time," a senior finance ministry official said Monday, as the currency neared the 160 line against the U.S. dollar, a level at which authorities have previously intervened to slow the yen's decline.Masato Kanda, the country's top currency diplomat, expressed concern about the negative impact of rapid yen fluctuations on the economy, at a time of market caution that another round of yen-buying, dollar-selling operations may come.The Bank of Japan is also keeping tabs on how the yen's recent weakness impacts infla…READ FULL ARTICLE