"Currency issued by the Japanese Military Authority, as a replacement for local currency after the conquest of states. On 6 September 1945, the Japanese Ministry of Finance announced that all military yen became void, reducing the military yen to useless pieces of paper."

Dutch East Indies
(1944)




(1942)


Oceania


Burma


Philippines




Singapore et al.




Territories occupied by Japan (including Hong Kong)
"On 13 August 1993, an organization in Hong Kong seeking a refund for military yen took legal action against Japan, suing the Japanese government for the money that was lost when the military yen was declared void. A Tokyo district court ruled against the plaintiff on 17 June 1999, stating that, although it acknowledged the suffering of the Hong Kong people, the government of Japan did not have specific laws concerning military yen compensation. Japan also used the Treaty of San Francisco, of which the United Kingdom was a signatory state, as one of the reasons to deny compensation.
"


America-occupied Okinawa (1945-1958)
Professor Michiko Iha of the University of the Ryukyus has argued that the B yen was part of a scheme by the occupying authorities to keep the dollar strong and yen weak, in order to more cheaply construct and maintain military bases.[3]
After the B yen was demonetised, rather than being incinerated (as is usual with obsolete banknotes) the B yen banknotes were placed into large concrete containers with indelible red dye, which were buried at sea at unrecoverable depths.[6][7]