12 August 2012, on the same day that Japan announced it was sending minesweepers to join the U.S. Navy in the Persian Gulf, a USN destroyer collides with a Japanese oil tanker.

It happened in the middle of the night, near the Hormuz Strait.  The USS Porter is badly damaged and must be repaired.  No injuries were reported. The USN is investigating why the crew of the USS Porter did not see the huge Japanese oil tanker.

There has been no word about damage to the tanker.

Japan had recently allowed the government backing of insurance for Japanese tankers carrying Iranian oil, as a way to get around U.S./European sanctions.  Japan also discussed with Iran the possibility of using Iranian insurance companies.