How is the US going to affect Japanese traffic around Luzon without ships, planes, supplies and with the Japanese in Mindoro, Palawan, Borneo, Formosa and Indochina? The same goes for Oahu, with the Japanese in Kauai, Maui and eventually the Main Island.
On the intitial attack the Japanese can occupy Niihau (a good size island) in an hour with 50 men, since it was completely undefended and Kauai and Maui are easier to take than Wake or Hong Kong. Kauai and maui have large, undefended coasts and few men in the interior. They're a joke.
You talk of landing strips as if the Japanese needed a concrete runway. Hell one of the much heavier B-17s landed safely in a golf course and took off for Oahu when the attack stopped.