The modern world is long past the days of depending on sails and wind power to drive ships from coast to coast — or at least it was, until the University of Tokyo developed a remarkable metal sail system.

Although hybrid freighters have been around for a while, and wind has been used as recently as 2008 to markedly reduce fuel costs (remember the MS Beluga Skysails?), the potential for the University of Tokyo’s ship to cut costs is even greater.