The Abe administration has proposed sharply cutting Japan's tariff on a certain amount of U.S. pork over a 10-year period in talks on the Trans-Pacific Partnership, according to sources.

The sources also said that Tokyo proposed safeguards during ministerial-level negotiations with Washington in September that would be triggered if pork imports from the United States exceed a quota to be set.

The bilateral-level proposal was made ahead of the latest round of broader talks by TPP chief negotiators that wrapped up Sunday in New York.