Why a Japanes CV is a reasonable request for a new variant of an existing unit:
The behavioral modeling need not be modified - it can be left to cruise at the same speed and operating it on the 2 dimensional water terrain remains the same.
All that needs to be addressed is shaping and skinning and where to place turrets and aaa (ok, modeling slightly different armament but, for the most part, the ai ack cloud is the ai ack cloud - player operated mounts would be a selected part of: 12 × 100 mm (3.9 in)/65 cal anti-aircraft guns in twin turrets and 51 × 25 mm (1 in) anti-aircraft guns).
It really will make a MAJOR difference, regarding Pacific scenarios when it comes to immersion.
The Taiho is also a possibility: