a taxi with a wind-powered mobile phone charger mounted on its roof. Ok, maybe I'm being a bit unfair to Japan. I should also mention that many of the world's coolest gadgets are invented here too (this one is relatively mundane, although still very cool). But putting a wind turbine on a car roof certainly crosses the line between normal and wacky.
It is justified here as a purely promotional exercise to encourage the use of greener energy, which I suppose is fair enough. Some other web coverage seemed to believe that it was a genuine (though small) contribution to reducing carbon emissions, which is a bit worrying. Putting a fan on the roof, thereby increasing drag, just so a small proporrtion of the extra fuel burnt could be converted into electricity, is a bizarre approach to energy efficiency!