@teto >The tariffs are there so companies sell less after increasing prices and then move to the USA
Yes, that's the 計画けいかく (note: keikaku means plan), but in practice what happens is that companies just increase prices to include the tariffs plus a bit more and do not move.
>If the company doesn't move it's just a permanent price increase with no benefit for customers in the USA
Which is exactly what will happen in most cases.