Ok, so it wasn't a vending machine....
But real estate in Japan is AT A PREMIUM... not kidding at all.
Many many many car parking places use vertical storage.
When I was in Yokosuka in 1997, my apartment faced a Daihatsu dealer that was about 10 stories tall, and glass like that. The cars moved around in it like you would see a vending machine move them.
When you can't store cars laterally - you MUST go vertical!
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."