Japan wants to first determine what progress is being made by European nations to deal with the crisis, as well as contributions to the IMF planned by other nations, and so doesn't plan to announce how much it will contribute during an upcoming meeting of G-20 finance ministers and central bankers, the report said.
The Group of 20 industrialized and developing nations meeting will take place in Mexico City on Saturday and Sunday.
Euro-zone leaders are scheduled to meet on March 1-2 to discuss the debt crisis.