Japanese carmakers have largely absorbed the cost of US President Donald Trump’s tariffs on auto imports, a move that may undermine the Asian nation’s negotiating power ahead of a July 9 deadline that will see duties rocket even higher.

U S President Donald Trump has threatened to impose a "30% or 35%" tariff on Japan if a deal between the two countries is not reached before a deadline next week. That would be well above the 24% tariff Japan was hit with as part of Trump's so-called "Liberation Day" on 2 April, when he announced steep import duties on countries around the world.

He said Japan could face a tariff of 30 to 35 percent if no deal is made, higher than the 24 percent reciprocal tariff Trump had originally imposed, and then paused, in early April. The tariff pause ends on July 9, though Trump has touted flexibility on the deadline.