High Quality Content by WIKIPEDIA articles! On the first of January 1942, Admiral Nagumo's Carrier Fleet departed from Hiroshima Bay, with four carriers: Akagi, Kaga, Sh kaku and Zuikaku to Southeast Asia to support Admiral Kajioka's invasion force in the New Guinea sector. Later supported by bombardments from Navy embarked aircraft, Naval detachment forces landed in February 23, 1942, in Rabaul at the northwesterly point of New Britain, Admiralty Archipelago at same meridian of another important Japanese Base, Truk, in the South Pacific Mandate.