The United States has upgraded Japan to include it among countries it judges to fully meet minimum standards for the elimination of human trafficking, according to a State Department report released Thursday.It was the first time that the United States has ranked Japan on Tier 1, the highest classification on the four-tier list, a senior State Department official said, citing the achievements the Japanese government made during the reporting period that ended in March.Japan was upgraded from last year's Tier 2, partly due to the launch of an interagency task force to combat "enjo kosai," or…READ FULL ARTICLE