Vehicle ownership isn't as simple in Japan as it is here, at least if you live in/around a major city. Before you're allowed to buy a car you have to prove you have some place to park it, and that in itself isn't cheap. They're also taxed based on the size of the vehicle engine, which is why so many of their "trucks" look so small to us. They're basically upscaled UTVs with engines in the 600cc range. Naturally this translates to their RVs as well. They tend to be small, to us. But Japanese are the absolute Boss of stuffing 100 lbs of crap in a 10 lb box and doing it in an interesting and useful fashion. I'd also wager the average rv over there is wayyy better built than the ones you buy here. They expect quality, but unlike us are more willing to pay for it.
Oh, and try getting this to fly in the U.S. You can tell by the license plate the age group of the driver. IOW....Old Fart On Board.
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Dewey, Cheatum, and Howe would have a seizure from the dollar signs flashing before their eyes if someone tried to pull that here.