Car/electric rental in Zamamai/Tokashiki/Aka

I'm already renting a car in Okinawa (Naha), was looking into storing car into ferry but apparently prices might be like 10,000 yen just for one-way.

So i'm trying to look into renting a car/electric mobile into one of these 3 islands Zamamai, Tokashiki or Aka. But when I google, I literally cannot find any websites to rent cars there. Can anyone link me to comparison websites or direct websites I can use to do this? Unfortunately my friend cannot cycle and isn't a fit person let's say. So we ideally want to go around the island in a electric mobile or car.

by Stunning_Suit_3934