I also imported exactly the same lights from Japan. But the problem with the ligts is following: in dark or nigts the lights are totally invisible, absolutely no reflection. Now I begin to worry to stop the car by roadside. Also there is no homolagation for the lights outside Japan. Beside that the look is great.
Most of these aftermarket taillights do not have a built in reflector. So you add one to your van (as you mentioned). It's not fake- it's just not legal in most locations without an added reflector. Many new cars/vans/trucks have a separate reflector mounted on the bumper.
My tails came with a separate reflector that I mounted under the lights. (My photo was taken before I added the reflector)