Japan's $550 billion investment package agreed in this week's U.S. tariff deal could help finance a Taiwanese firm building semiconductor plants in the U.S., Japan's top trade negotiator Ryosei Akazawa said on Saturday.

U.S. President Donald Trump’s trade deal with Japan has sparked fresh optimism that the global economy will manage to avoid getting hit with extremely elevated tariffs, even as many U.S. trading partners still don’t have agreements.