I don't think it ever will, tbh. People don't want Jap sports cars any more, they want hot hatches or German diesels. Nobody wants an uber-Scoob, nor an R35 covered in Japanese writing inside, and the BRZ86 isn't getting any more popular until they release a full power version of it.
The Jap import scene was big years ago because you couldn't buy those cars over here full stop, but now you can get OEM warranty-backed versions here so there's no point in trying to save a few quid with the risk/hassle involved IMHO. It's a shame perhaps, but the world has moved on.