A significant majority of Japanese firms have found the business impact of U.S. President Donald Trump's tariffs within expectations and have not found it necessary to change investment plans, a Reuters survey showed on Thursday.

Prime Minister Shigeru Ishiba, speaking after the G7 summit in Canada, confirmed that negotiations with Washington had failed to yield a full tariff agreement.

Exports to the U.S. slid due to weaker demand for cars, auto parts and chip-making machinery.