You are good Mr Duck, thought that one may take a while.
The Japanese landing in Australia (January 1944)[edit]While the Japanese government never adopted proposals to invade Australia,[76] a single reconnaissance landing was made on the Australian mainland. Between 17 and 20 January 1944, members of a Japanese intelligence unit named Matsu Kikan ("Pine Tree") made a reconnaissance mission to a sparsely populated part of the Kimberley region of Western Australia.[77] The unit, operating from Kupang, West Timor, used a converted 25 long tons (25 t) civilian vessel called Hiyoshi Maru and posed as a fishing crew. The mission was led by Lt. Susuhiko Mizuno of the Japanese Army and included another three Japanese army personnel, six Japanese naval personnel and 15 West Timorese sailors. Their orders, from the 19th Army headquarters at Ambon, were to verify reports that the U.S. Navy was building a base in the area. In addition, the Matsu Kikan personnel were ordered to collect information which would assist any covert reconnaissance or raiding missions on the Australian mainland.[78]
Hiyoshi Maru left Kupang on 16 January and was given air cover for the outward leg by an Aichi D3A2 "Val" dive bomber which reportedly attacked an Allied submarine en route. On 17 January, Hiyoshi Maru visited the Ashmore Reef area. The following day the crew landed on the tiny and uninhabited Browse Island, about 100 mi (87 nmi; 160 km) north west of the mainland. On the morning of 19 January, Hiyoshi Maru entered York Sound on the mainland. Although the crew saw smoke emanating from hills to the east of their location, they nevertheless anchored and camouflaged the vessel with tree branches. Local historians state that Matsu Kikan landing parties went ashore near the mouth of the Roe River (150816S 1252311E).[79] They reportedly explored onshore for about two hours, and some members of the mission filmed the area using an 8 mm camera. The Matsu Kikan personnel spent the night on the boat and reconnoitred the area again the following day, before returning to Kupang. The Japanese did not sight any people or signs of recent human activity and little of military significance was learnt from the mission.[78]