The Persian Gulf's biggest oil terminal, located on Iran's Kharg Island, is appealing for greater Japanese trade. Officials say they plan to reward Japan for its support during the years of sanctions with priority in deals and investment.

Only 1½ hours by air from Tehran, huge oil tankers swing into view as they lie anchored off the coast. Some vessels are waiting for a berth, while others are transferring petrochemical products from ship to ship.

When petrochemical storage tanks on Kharg Island are full, Iran stores the products in tankers. Pre-loading them also helps it to sell them faster.