Yes that's 100% correct.
Go to Japan, you must own the car for a year and then you can bring it in, no matter what car it is.
My jap teacher did the same thing when he came here.
Just remember though, you'll have to buy a parking space in Japan. Not sure how much it costs. Depends on where you're staying as well. You cannot own a car in Japan without purchasing a parking space for the vehicle because it's so dense and congested.
I'm planning to do what you're doing in a few years' time