The Japanese government-issued dollar was a form of currency issued for use within the Imperial Japan-occupied territories of Singapore, Malaya, North Borneo, Sarawak and Brunei between 1942 and 1945. The currency was also referred to informally (and with more than a trace of contempt and derision) as banana money (Malay: duit pisang), named as such because of the motifs of banana trees on 10 dollar banknotes. The Japanese dollar was in widespread use within the occupied territories where the previous currency became scarce. The currency were referred to as "dollars" and "cents" like its predecessors, the Straits dollar, Malayan dollar, Sarawak dollar and British North Borneo dollar. The Japanese dollar was one of several forms of Japanese invasion money issued throughout the newly expanded Empire of Japan. Similar currencies were issued in Burma (as the Japanese rupee), the Dutch East Indies (as the Japanese gulden/roepiah), the Philippines (as the Japanese peso) and various Melanesian and Polynesian territories (as the Japanese pound). History Following the fall of Singapore into the hands of Imperial Japan on 15 February 1942, the Japanese introduced new currencies to replace those previously in use in the occupied territories of Malaya, North Borneo, Sarawak and Brunei. The new currency in Malaya and Singapore were issued with the same value as the Malayan dollar, and first entered circulation in 1942. As with other currencies issued by Japan in occupied territories, local residents were forced to adopt the new currency, although existing coins were allowed to circulate until a shortage of coins required the Japanese administration to issue notes instead. Although new coins, bearing the name "Malaysia" and dated under the Japanese calendar, were planned for the region by the Osaka Mint, they never made it past the concept stage and only a few rare patterns exist. To supply the authorities with money whenever they required it, the Japanese simply printed more notes. This resulted in hyperinflation and a severe depreciation in value of the banana note. Moreover, counterfeiting was rampant due to the absence of a serial number on many notes. Increasing inflation, coupled with Allied disruption of Japan's economy, forced the Japanese administration to issue banknotes in larger denominations, and increase the amount of money in circulation. Sharp drops in the currency's value and increased price of goods frequently occurred following a Japanese defeat in battle abroad. After the surrender of Japan, the currency became entirely worthless,