"Almost as soon as the war was over, American forces began to discover stupendous caches of Japanese war treasure. General MacArthur, in charge of the occupation, reported finding 'great hoards of gold, silver, precious stones, foreign postage stamps, engraving plates and . . . currency not legal in Japan'. His officials arrested the underworld boss Yoshio Kodama, who had worked in China during the war, selling opium and supervising the collection and shipment to Japan of industrial metals such as tungsten, titanium and platinum. Japan was by far the largest opium producer in Asia throughout the first half of the 20th century, initially in its colony of Korea and then in Manchuria, which it seized in 1931. Kodama supplied heroin and liquor to occupied China in return for gold coins, jewellery and objets d'art, which the Japanese melted down into ingots.

[...]

Back in Washington, it was decided at the highest levels, presumably by Truman, to keep these discoveries secret and to funnel the money into various off-the-books slush funds to finance the clandestine activities of the CIA. One reason, it has been alleged, was to maintain the price of gold and the system of fixed currency exchange rates based on gold, which had been decided at Bretton Woods in 1944. Just like the South African diamond cartel, Washington's plotters feared what would happen if this much 'new' gold was suddenly injected into world markets. They also realised that exposure of the Imperial household's role in the looting of Asia would destroy their by now carefully constructed cover story of the Emperor as a peaceful marine biologist. Washington concluded that even though Japan, or at least the Emperor, had ample funds to pay compensation to Allied POWs, because of the other deceptions, the peace treaty would have to be written in such a way that Japan's wealth would remain secret. The treaty therefore gave up all claims for compensation on behalf of American POWs. To keep the Santa Romana-Lansdale recoveries secret, MacArthur also decided to get rid of Yamashita, who had accompanied Chichibu on many site closings. After a hastily put-together court martial for war crimes, Yamashita was hanged on 23 February 1946."

LRB re cheeky gringo elite