They aren't JDM if the company has a division in the US.
Volk is imported through Mackin Industries, but there is not a Rays/Volk USA.
Rota makes replicas of popular designs.
Subzeros are copies of the Racinghart CP-035:
Slipstreams are copies of the Spoon SW388:
Torques are copies of the Work Emotion:
As far as I know, Rota does not have any original designs.