During the occupation the Japanese replaced the Malayan dollar with their own version. Prior to occupation, in 1941, there was about Malaya $219 million in circulation. Japanese currency officials estimated that they had put $7,000 to $8,000 million into circulation during occupation. Some Japanese army units had mobile currency printing presses and no record was kept of the quantity or value of notes printed. When Malaya was liberated there was $500 million of uncirculated currency held by the Japanese in Kuala Lumpur. The unrestrained printing of banknotes in the final months of the war created hyperinflation with the Japanese money becoming valueless at the end of the war.