Auto giant Nissan's electric bet
The boss of Nissan, Carlos Ghosn, has not been shy about expressing his disdain for hydrogen. Instead, Nissan is betting on lithium ion batteries.
It's battery-powered car - the Leaf - looks like a normal family hatchback, but just needs to be plugged in to recharge.
The BBC's Tokyo correspondent Rupert Wingfield-Hayes takes it for a spin.