What does the Japanese fleet look like in the 1930s if the Great Kanto earthquake never occurs?
Short answerIt is broadly similar, except Amagi serves with Akagi as a carrier instead of Kaga.
NotesThe earthquake damaged Amagi and historically changed Japan's conversion choices. In the counterfactual, Amagi would likely enter carrier service alongside Akagi. Kaga would no longer be the substitute conversion. The overall fleet would not change radically, but the identity of one major carrier would.