For A12, Radio Japan is listed for a new relay site - Palau.
Schedule is on 11705, 1315-1430 in Indonesian and E English,oish.
Other sites listed for A12 are Sackville, Kranji, Tashkent, Yamata, Wertachtal, Bonaire, Madagascar, Woofferton, Issoudin, Dhabbaya, and Santiago.
Regards from Melbourne!
Here are some images from the Australian War Memorial
Darwin 1942 – Japanese bombs exploding
Darwin – damage to cable station by Japanese bombing - 1942