When it comes to electric vehicles, Japan is speeding ahead of the rest of the world, blissfully free of the range anxiety that afflicts plug-in drivers elsewhere. The country now has more electric car charging stops than petrol stations, according to a recent survey by Nissan. The Japanese automaker, whose fully battery-powered Leaf can travel up to 172km (107 miles) on a single charge, said there were more than 40,000 places nationwide where electric car…