Dhaka, Dec. 22 -- Tokyo - Japan's relationship with Iran is an important foreign policy matter on which Tokyo differs significantly from its closest ally. Tension between Iran and the United States is running high since last year when President Donald Trump unilaterally pulled his country out of 2015 nuclear deal that Tehran signed with six major powers of the world and re-imposed sanctions. This placed Japan in a difficult situation as Tokyo just resumed oil import from Iran after the treaty was signed and Japanese business were venturing possibilities of investment opportunities in the country. However, Trump not only had taken unilateral decision of going back to earlier position of imposing sanctions on Iran, but also had asked allies...