Mazda has revealed more details of the weight-saving strategy that it says will help to cut up to 200kg from each of its next generation of cars.
The firm will use three different methods, concentrating on lighter materials, new designs for vehicle chassis and new material bonding techniques.
Many of these techniques were pioneered in the design of the 2, and Mazda plans to develop them further before using them to reduce the mass of a raft of new models.
The biggest change will be in the design of underbody structures, in order to maintain safety levels but not increase weight.
Instead of transferring crash forces through the car's body, impacts will be fed through the floorpan, which requires less strengthening.
This means the top half of the shell can be lightened. The car's sides will be straighter, too, with fewer curves, as this creates a stronger frame with less metal.