Nippon 2007, the Worldcon in Japan, revealed publicly for the first time at Chicon 7 last year how much money it had lost.
The latest financial report [PDF file] from Nippon 2007 to members of LoneStarCon 3 corrects an error and now lists the total loss in US dollars as $94,736.84, somewhat less that originally reported. Donors have given $72,370.81. The remaining shortfall is $22,366.03.
Donations were collected in Japan and from past Worldcons with surpluses. The report notes some of these donations have yet to be paid out and are currently held in US and Canadian funds.