A tangent would be brakes. Some cyclists ride a type of bike called a 'fixie'. Fixie comes from fixed, as in fixed gear--no derailleurs or hub shifting at all. Besides the simplicity of no gears, it saves weight, and may even be sort of theft-resistant, since many stolen bikes end up being parted out, and there are fewer of those harvestable parts on a fixie.
Some fixies--the purist type--are direct drive. The rear sprocket does not 'freewheel'--when the rear wheel is turning, that sprocket is turning, and the pedals are necessarily turning at the same time. You cannot 'coast' on this kind of fixie, but it also means that the pedals can be used for braking: stop/slow the pedals going round, and you can stop/slow the bike. But that is rear wheel braking only (much less effective than a front brake), and it requires good riding technique. And some pseudo fixies do have a rear freewheel, so you can coast as on most bikes.
Bikes in japan are required to have brakes, even fixies like I've described. And it's not unusual for fixie riders to get stopped by the police if the police can't see a brake on a bike someone is riding. And heh, no brake(s) means the rider will get ticketed. (Most all fixie riders add a front brake for this reason--to stay legal.)
Anyway, to the point...
I'd bet money that that electric suitcase does not have brakes. So the 'rider' could be ticketed not only for 'driving' an unregistered vehicle--without a license--but also for that vehicle/bike not having proper brakes. (And no bell, no reflectors, etc.)