No, it's not quite the 600mph 'Hyperloop' train proposed by mad genius billionaire Elon Musk.
In fact it's only about half as fast.
But the new Japanese LO1 magnetic-levitation train does have the benefit of actually existing - and is currently on schedule to be deployed on the Tokyo-Nagoya line by 2027.
The 311MPH next-gen Bullet Train will start full tests in September, but was publicly displayed this week propelled by a maintenance vehicle on a specially-built track at the Yamanashi Prefecture.
Built and designed by Central Japan Railway, it will cut the time taken by the - already very fast by British standards - Bullet Train from 90 minutes to 40 minutes.
China opened the first commercial Maglev service in 2004. The Shanghai Maglev can travel at 264mph, though its average speed is closer to 150mph. The fastest train in the UK travels at 125mph. The proposed HS2 line from Manchester to London would operate at up to 250mph.