I'm just going to take wild stab in the dark and guess it's going to be centered around Okinawa, more specifically the Okinawa Islands and Amami Islands. Two archipelagos on the border of the East China Sea and Pacific would be great for carrier operations without leaving any shore based aircraft behind due to the large airfields that are present on most of of the islands, Okinawa in particular stands out with it's three massive USMC, US Air Force and JASDF bases.