parsifal
Colonel
Considering that the Imperial Japanese Navy lost 4 of their Fleet Carriers at Midway out of 6 that were present - the two other carriers were light carriers, held in reserve. This was 4 of the 6 fleet carriers that the IJN possessed at the time - add to that the experienced pilots and aircraft that the IJN were hard-pressed to replace.
The two remaining fleet carriers, Shokaku and Zuikaku both would be sunk 2 years later during the Battle of Philippine Sea without any real contribution during that battle.
So in the end, the loss at Midway was a tremendous setback for their force projection and they hobbled along with light carriers from that point onward.
Now when I say "turning point" of the Pacific War, I am not tossing that out there on my own accord, I am simply going by the word of historians, both civil and military, who have made that determination long before I was even born.
The problems facing the Japanese at that time was not deckspace, it was trained aircrew. It was not the loss of 4 out of 6 carriers, either, it was 4 out of 8. The loss of 250 aircraft at Midway was a serious blow, but the numbers of aircrew that survived was substantial. It was unrealistic to expect that the big fleet carriers of the USN could be engaged with few or no losses....what was needed was that the US carriers be engaged and written off whatever the cost to the Japanese. this the IJN failed to do at Midway. ,The IJN expended some of its precious elite aircrews but did not achieve the victory it was looking for. In reality even this was unrealistic as an objective by June.
Aircrew losses for the IJN were within the normal or expected range. The numbers of carriers lost were much higher than expected, Even with the normal or expected losses Japan was unable to bring the CAGs of the carriers up to full strength. After Santa Cruz, the last of the Pearl Harbor veterans had been expended with no decisive result inflicted on the USN. The Japanese Carrier fleets did not know it yet, but after Santa Cruz their bolt was shot.
So, Midway was an important attritional battle, but far from a pivotal battle. It was part of a larger strategy, brilliantly delivered by the USN leadership. Midway was part of that wider strategy, and a massive propaganda and morale coup, but not decisive for the reasons relating to carrier losses. It was more a missed opportunity for the Japanese, and a pattern of survival for the US aircrews and carriers. They had not been subjected to a one sided crushing defeat. They had suffered some losses, and this would continue until the end of the year, but the losses sufferd by both sides were closer than is often portrayed. The "victory" at Midway was firstly that the US carriers had survived, and secondly the diminishing asset of Japanese airpower had failed to achieve the decisive victory that they desperately needed