A motorised transporter the size of a tablet computer has been developed by a Japanese engineer.

The WalkCar can reach a top speed of just over 6mph (10km/h) and can support riders weighing up to 120kg (265lbs).

Inventor Kuniaki Sato said the device was designed for recreational use as well as for business.

He told Reuters: "I want to show the world that Japan can also be innovative."

Mr Sato is hoping to secure crowdfunding before the gadget can be mass produced.