Shinto Abe is the first Japanese prime minister to visit Tehran since the 1979 Islamic revolution. He arrived on Wednesday for a state visit on a bid, approved by President Donald Trump during his visit to Tokyo last month, to alleviate the crisis between the US and Iran. Abe first checked the responses of Beijing and Moscow. Until a short time ago, Japan was one Tehran’s biggest oil customers. Abe hopes to allay high US-Iranian tension by securing an easing of US sanctions on Tehran’s oil exports and relieving its economic plight.