TOKYO (AFP) ― Energy-saving electric cars with advanced green technology vie for attention as the Tokyo Motor Show opens Wednesday, with robots and computers becoming ever more part of the vehicles on display.

Companies are showcasing concept cars with “transformable” bodies and automotive computers linked to smart phones, while showing off energy-efficient vehicles with electric, fuel cell and hybrid engines.

On display on Wednesday will be the compact, fuel-efficient cars with which Japanese carmakers are hoping to shake up moribund domestic sales as the industry tries to pick itself up from March’s quake-tsunami and the ongoing global economic downturn.

“The Japanese market is still important for European carmakers that are interested in environmental technologies such as electric and hybrid cars,” said Tatsuya Mizuno, a director at Mizuno Credit Advisory in Tokyo and a vehicle industry expert.

Toyota is looking to burnish its green credentials when it unveils the “Aqua,” a compact hybrid car, and several concept vehicles including an advanced fuel cell car and a plug-in hybrid.

The “Aqua.” to be sold under the name “Prius C” outside Japan, offers fuel efficiency of approximately 35 kilometers per liter, beating Toyota’s existing Prius model at 32.6 kilometers per liter, making it one of the world’s most fuel efficient cars.

The Japanese auto giant plans to launch the five-seater model in late December in Japan, before a gradual global roll-out.

Toyota is also showing off a concept model with advanced telemetric, which allow communications among vehicles and let drivers share traffic information online.

Automotive telemetric enable drivers to access all sorts of digital content online, making a car like a moving personal computer.

Rival Nissan, which is part-owned by Renault, is showing off several electric concept cars, including the Pivo 3, which can be remotely maneuvered with a smart phone.

Nissan has already installed automotive telemetric in its Leaf electric car, which allow users to remotely control the air conditioning system and check on the condition of the battery using a smart phone or personal computer.

This year’s motor show will feature 176 exhibitors from a dozen countries and the venue is almost twice as large as the 2009 edition of the biennial event.

Several major foreign manufacturers who skipped the last show are back, including Germany’s Volkswagen, BMW, Mercedes and Porsche; French carmakers Renault and Peugeot-Citroen and Britain’s Jaguar and Land Rover.

Manufacturers from outside the auto industry are also taking part in the show.

Among them is Kowa Tmsuk, a joint venture by electric optical machinery maker Kowa and robot developer Tmsuk, unveiling a concept electric vehicle called “Kobot,” with a body the company says “transforms” via telematics linked to a smart phone.