Was victory over Japan naval power or air power?

Was the American defeat of Japan a victory for maritime power, air power, or both?

Both contributed, with maritime power providing the logistics and sea control on which the air campaign depended.

Victory over Japan depended on maritime logistics throughout the war. Submarines attacked Japanese supply lines, while carriers secured the sea control needed to deliver supplies. Seaborne logistics sustained the air campaign as well as operations at sea. Air power could deliver the final blow because naval forces provided and protected the supply system behind it.