Japan’s top trade negotiator and Minister of State for Economic Revitalization, Akimasa Akazawa, said the cuts on automobile tariffs could take time to be effected.

Japan said on Tuesday the trade agreement it struck with the U.S. cleared uncertainties on U.S. trade policies but continued attention needs to be given to risks of those policies putting downward pressure on the Japanese economy.

The White House factsheet on the trade deal mentions that Japan will also buy 100 Boeing Co. planes as well as US defense equipment worth additional billions of dollars annually. Akazawa said both these pledges were based on existing plans by Japanese airlines and the government, respectively.