Iranian-Japanese relations on the background of sanction

Iran has many difficulties in dealing with different countries. Especially these difficulties began after the Islamic Revolution of Iran, even more sanctions were imposed on Iran by United States and Europe becouse of it’s nuclear program. Despite the sanctions imposement, Iran still managed to to continue oil trade with most of the countries. Japan was among these countries. Alongside with China and India, Japane still managed to maintain stable political and economic relations with Iran. Becouse of Iran's nuclear program, these countries, including Japan, had difficult economical relations with Iran. Recently, when sanctions were reimposed on Iran, Japan was given a chance to continue its relationship with Iran on the purchase of oil products. However, the current president of the United States has made a stern warning that the countries have to stop all economical and political relations with Iran, including Japan and China. China ignoried warning and continues oil trade. However Japan had to break off oil trades with Iran. Recently, the situation is developing quite rapidly.