The IJN air arm, the IJN itself, pretty much died in the battles of the Philippine sea. CVs, airplanes, pilots, all of them unable to ever be replaced. It was a far more serious loss then Midway. The Great Marianas Turkey shoot was, in effect, the death knell of a once great navy.
And it wasn't just superior airplanes like the Hellcat. Or even a far superior training pipeline for pilots. By that time the USN outclassed the IJN in about every way imaginable. Most of all in radar, fire control, battle management, communications. Even our submarine doctrine was far superior. It was USN boats shadowing IJN battles groups, on their own, operating on their own, that gave us constant Intel on the deployment of IJN assets. Attacking them often.
The IJN simply made enemies with a better Navy. Our congress, with a stroke of the pen, ordered 32 Essex class super carriers to be built, Of which we built 26 "only ending cause we won the war", along with their highly trained air squadrons. This isn't even counting our light CVs or shore based USN and USAAF land based fighters. How in hell were the Japanese ever going to beat that? They ended up sending these poor schmucks up, off of converted cruiser hulls, with 50 hours air time and in fighters far outclassed. Against an enemy who knew they were coming.