Japan gets 90% of its oil from the Middle East, much of it from tankers going through the Straits of Hormuz. President Trump says Japan needs to contribute in patrolling costs for the waters in the region. Japan has good relations with Iran and has acted as an intermediary in talks between Iran and the U.S. A recent attack on a Japanese ship in the Gulf of Oman have led to Japan taking a more active role in the region. A Japanese destroyer will now patrol waters in the region as part of an effort by Japan's Maritime Self-Defense Forces.