Oceania
Oceania refers to British New Guinea, the Solomon and Gilbert Islands and other small island outposts. These islands were captured in order to defend the islands within the Co-Prosperity Sphere. In 1942 the Japanese issued a ½ shilling note for use in these areas. This money is sometimes wrongly identified as being printed in preparation for an invasion of Australia; no such invasion was ever planned and this denomination was not used in Australia.
Read more about this topic: Japanese Invasion Money