At the moment CV is just weak in general, except Midway/Essex will able to perform decently as it have more damaged torps, slightly flying tank fighters, decent bomber and they're all faster than IJN. IJN also now run into the problem of death penalty, introduced in this most recent major part where if your whole air group is destroyed then you suffer some insane 2 minutes wait time before you can launch your air group again, and IJN being smaller and have less hp than their USS counterpart for some odd reason, Taihou and Hakuryuu just pale compared to Midway/Essex.
Hakuryuu/Taihou was OK before the patch where they changed how the commander skills Dog Fight expert works, but now it just doesn't ever give much benefit at all due to the fact that CV MM are mirrored, so the only thing that saved IJN Tier 9-10 was destroyed. However for tier 6-8 IJN just about do OK and in fact Tier 7 Hiryuu perform far better than her counterpart Ranger. Shoukaku and Lexington match up its kind of more of a captain skill level based, however if we assume both are equally skilled then I believe Shoukaku have a slight disadvantage. I recently got the Ryuujou just to make my 150 plane kills a breeze, so I might eventually move to Hiryuu as the general CV population seems to agree that's when the IJN really shine as a CV, but other than that IJN CV 8-10 might suffer from poor MM and just disadvantaged compared to their USS counterpart at the moment (and CV as a whole).