Admiral Nagumo didn't detail an accurate battle report to the high command until the middle of June, after which the Imperial Japanese Navy decided to characterize the outcome of the Battle of Midway as a great victory. The Imperial Japanese Army still believed that the main IJN fleet still existed until at least July 1943. In the interim, the Japanese Navy was shuttling survivors of the battle off to distant and isolated island bases in the Eastern Pacific so that the story wouldn't leak out.
This is a first. One post that is a year too early (D-Day) and one that is a year too late (Midway). June 1943 is a dull month compared to the years preceding and following.