i admit some people - mostly nissan and honda people cling onto the word where perhaps they should say 'import' or something, but really its gone beyond an industry term and is now - as you said bandied about by anyone who has something remotely japanese
but you say these things and then you are advertising a kia koup customising thing at the top of your page
i know you didnt say it was jdm, but honestly....its all fashion now days