Toyota has revealed the exterior design of its hydrogen-powered Fuel Cell Sedan, following the car’s appearance in concept form at motor shows since October 2013.

The four-door saloon will be introduced first in Japan, before next April. Preparations are in hand for launches in the US and European markets in the summer of 2015.

In Japan the Fuel Cell Sedan will priced at approximately seven million yen (about £40,450), although prices for Europe are yet to be confirmed and are likely to be higher.

Detailed information such as final prices, specifications and sales expectations will also be announced later.

Toyota says hydrogen has great potential as an alternative fuel. It can be produced from a wide variety of primary energy sources, including solar and wind power; it is easy to store and transport; and when compressed, it has a higher energy density than batteries.

It could also be used in a much wider range of applications beyond automotive and domestic use, including large-scale power generation.

The Fuel Cell Sedan delivers performance and a cruising range similar to that of a petrol-engined vehicle, and refuelling takes roughly three minutes. When driven, the car’s only tailpipe emission is water vapour, produced by the chemical reaction between the hydrogen and oxygen.

Fuel cell vehicles contribute to the diversification of vehicle fuels. The vehicles no carbon dioxide or substances harmful to the environment when driven, but offer the convenience associated with petrol-powered vehicles. Toyota believes the technology has great potential in the development of vehicles that are kinder to the environment and ideal for helping deliver sustainable mobility.

Karl Schlicht, executive vice-president Toyota Motor Europe, said: "We are very excited by the arrival of fuel cell technology. Of course there are many challenges ahead, such as the availability of fuelling infrastructure and customer awareness. But our history with hybrid gives us all the experience we need to bring a new technology to the market.

"In Europe we will be taking it step by step, gradually introducing the car in selected markets. But we are confident that hydrogen will become increasingly popular as a way of powering vehicles."

Toyota companies are also engaging in other hydrogen-related initiatives, such as developing and testing fuel cells for use in homes, and designing fuel cell forklifts and buses.