John Kennedy actually said...
In the agreement with Japan, the United States corrected an error consisting of the omission of a part of a concession it had agreed to grant Japan in the 1960-61 tariff conference but which it had inadvertently failed to include in either the relevant preliminary agreements with Japan or the United States schedule to the tariff conference protocol.
Context
Special Message to the Congress Transmitting Trade Agreements With the United Kingdom and Japan
01/08/1963