Correct bro, it is a gradual improvement from the Hyuga , which was based on FCS-3 , AESA. Tho while the FCS-3A is offensive platform, the OPS-50 is comprehensive, but defense-oriented. As is the case should be for Carriers. So you see how Izumo class is really different from Hyuga in the case that Hyuga class was still built on destroyer 'platform' , but Izumo class is totally more carrier, in the conservative sense.
Now we have plan for DDH-90, and DDH-91. It is not verified yet, but there are rumors that this class of carrier will be in the 60-70k tonne range. A super-carrier, in every sense of the word.
Now, bro, JMSDF's can dance with PLAN.
PS. Maybe future training exercise together?