The fastest passenger trains around the world. 21 April 2015 Last updated at 22:41 BST. A Japanese magnetic levitation train has broken the world speed record. In a test run near Mount Fuji, the train reached a top speed of 603km/h (374mph). However, Japan is not the only country to boast rail travel of such super speeds. The BBC takes a look at some of the fastest passenger trains around the world.