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They could make a version for warmer climates that isn't enclosed. That would save weight and cost. Doing that would probably allow them to further reduce the weight by making it narrower. Maybe narrow enough to only need on set of tandem wheels. The weight savings might even allow for carriage of a passenger seated behind the driver. That would be kind of a dangerous vehicle though.
It is fine if they want to keep the ugly little toy in Japan. But a vehicle like that has no place on the roadways in the USA. We don't need such a piece of junk over here. There is simply no room on our roads for a vehicle that is a glorified extension of the drivers cell phone system.
The specs do seem quite similar to a golf cart. A new golf cart will hold two people but doesn't have doors. The price of a new one is on the order of $8k so this is clearly better if it is street legal. The 60km/hr limit is a problem though.