It's never a good thing when the US runs out of light carrier names. As a heads up, the US has 14 CVL names and they don't start the game with any CVLs... Since I see "7th CVL", they have or had at least 21 CVLs. I don't recall if you sank any CVLs, so if not then there are at least 21 roaming around. One thing to remember is that between 1941 and 1945, the US out-produced the rest of the world's combined naval production from 1936 to 1945!. The entire RN from 1918 to 1945 was less than the total tonnage of US carriers built in 4 years and the IJN's total new tonnage was less than the US destroyers'. The US historically had 50% more fleet carriers than the rest of the world combined. You may have wiped the floor with the "old" USN ships, but they can easily build at least 4 times as many ships as Japan can, and those ships will likely be state-of-the-art.
I'd be more worried about China though. There's a large distance between the US and Hawaii, but China is next door. Losing in China risks Japan losing the IJA as well as Korea and Manchukuo.
One thing that helped me in my PRC AAR was to go slowly and only attack when my org was high. Japan has made rapid progress here and as a result the IJA's organization hasn't had a chance to fully recover. It might be best to go on the defensive for a while and perform a massive counter-attack like what China just pulled off. You may lose Guangxi, but if you do then that means you won't have to share territory with it