Under the new bill, the United States can charge an entire country as an unfair trader and retaliate against all its imports.
The Japanese are worried about being branded as "unfair" traders under last year's tough legislation.
Last year, Washington indentified the country to be an unfair trader, a move that could lead to trade sanctions.
India today assailed Washington's decision to place the country on a list of unfair traders.
Indeed, Washington is already thinking of reviving a trade law that allows it to declare countries unfair traders and apply sanctions.
Under one provision, for example, the Government could charge an entire country as an unfair trader and retaliate against all imports from it.
Japan is seen by many in Washington as the archetypal unfair trader.
The clause authorizes retaliatory measures against nations deemed unfair traders.
The statement was a reaction to the American decision to declare Japan and two other nations unfair traders.
In many ways, China is a picture-perfect unfair trader.