Pretty sure they all have to have a VIN # now. Many states require these to be registered which requires a VIN. In the very early models, Kubota screwed up and only made the VIN/Serial # 16 characters. By law, they have to be 17.also at least on mine the number is not a vin number but a serial number like a tractor.
That is what my 2020 is also. Have they switched from vin numbers to serial numbers?on my old 2014 model it is on the cab between the bed and the cab rear. also at least on mine the number is not a vin number but a serial number like a tractor.