Iran warIdemitsu Kosan also seeks to secure oil supply from sources outside the Middle EastIdemitsu Kosan is one of the few companies that has been able to slip a vessel through the Strait of Hormuz since the U. S. attacked Iran. (Nikkei montage/Source photos by Yuki Nakao and Idemitsu Tanker website)TOKYO -- Idemitsu Kosan, one of Japan's largest petroleum companies, expects the Hormuz crisis to begin subsiding in July, with oil prices to fall to pre-crisis levels early next year.