This is a light carrier, it has just been launched this year. It will soon launch F35Bs. It is not meant to be a super carrier, my dear child. We have no need to launch a super carrier, just yet. Japan does not consider itself a super power, we are just a major power. Only the United States has the capability to maintain a 10 CBG force simultaneously. Actually they are even building 2 Gerald Ford Class AC now.
PS. At least Japan was capable to build our own carrier. We are building our 2nd Izumo class. Unlike China, which had to buy an old soviet carrier, aka Liaoning. The emphasis i want to say here is that we have originality. Not bad for a "pacifist" nation. lol