The Silverado is my scale. That’s why I mention its size.
The Suzuki Carry, which has a tire size of 145/70r12. That’s a diameter of 20 inches. The tire looks to be about 3x the bed length of the Kei Truck. I think it’s closer to 2.75xs the tire, but at 3x it’s still 5ft.
I’m mentioning sizes of things for scale. It provides us with a way of identifying the potential length.