Neither the fire truck nor the concrete truck are Kei class vehicles.
They are small diesel trucks, yes, but Kei literally means 'light' and have strict weight limits on both the weight of the vehicle and how much load they can carry.
Looks like an N-Box. The rear doors are sliding.
That much is certainly true. It's such a shame that small trucks are not available to buy new in the US.
Neither the fire truck nor the concrete truck are Kei class vehicles.
They are small diesel trucks, yes, but Kei literally means 'light' and have strict weight limits on both the weight of the vehicle and how much load they can carry.