US-Japanese naval battles in the South Pacific in 1942/early 1943 are fascinating. The US prevailed by having bigger numbers and by the use of airpower. The Japanese did very well in surface actions around Guadalcanal where they consistently outclassed the US in ship to ship combat through superior tactical handling, training in night fighting and outstandingly effective torpedoes. The seabed around Savo Island is populated by far more sunken US ships than Japanese ones.
The US did have the advantage of radar in surface actions, but seemed to have a hard time exploiting it. In a strategic context the US had the numbers and the determination, as well as a massive production capability for aircraft and ship production; something foreseen by Japanese Adm Yamamoto before the war. US capabilities only got better while those of the Japanese diminished.
Purple, I gotta disagree with you here.
The Japanese had massive superiority in ships and planes (we agree on that) - right up until Midway in June '42. Even then, with the loss of four front-line carriers (and their irreplaceable pilots) the Japanese still had more carriers, battleships, and cruisers in the Pacific than did the USN and the Allies. The USN had to rely completely on local superiority, radar, and a hell of a lot of luck to win any naval battle, right up until late '43 when war production of new ships (especially Essex-class carriers and trained pilots) started reaching the Pacific.
What the Japanese DIDN'T have was the ability to replace lost ships quickly. A Japanese admiral (not Yamamoto or Nagumo) once said that "if you lose a ship, it will take years to replace", reflecting on Japan's industrial capability vs the US industrial capability. Once US war production hit high gear, it was impossible for the Japanese to win just about battle in the Pacific.
As far as exploiting the advantage of radar, the Americans simply didn't have the expertise in '42-'43 that was needed to take full advantage of radar, primarily because of the dearth of training funds prior to Pearl Harbor. As you know, it's damned expensive to run training exercises, particularly with maneuvering fleets around the ocean and flying simulated air strikes - both of which were desperately needed to fully understand the capabilities and limitations of the new radar systems.
A perfect example of this is the Battle of Santa Cruz, where the Hornet was lost. The Hornet's Fighter Direction Officer didn't have the knowledge he needed of the radar system, and thus had positioned his fighter aircraft (Wildcats) BELOW the incoming Japanese air strike. While the Wildcat was a decent fighter for the time, it was NOT a good climbing plane (although it could dive very quickly, making height a major advantage) so the Japanese were able to roll into their dives while the Wildcats were still climbing toward them. Naturally, the Japanese blew through the climbing Wildcats and hammered Hornet with 16 Kate dive bombers (and the 20 Japanese torpedo planes down low were completely untouched).
The USN knew the Japanese were coming, but because of mistakes made by the Hornet's FDO, it cost the USN a valuable carrier. While the USN planes hit and damaged two Japanese carriers (Zuiho and Shokaku), they didn't sink so were able to return to Japan for repairs. It's a lot easier to repair a ship than it is to build a new one from scratch.