maglev hit 375mph -lrb- 603 km/h -rrb- and travelled for 11 seconds at speeds above 373mph -lrb- 600km/h -rrb- on an experimental track in tsuru .
latest test run beat last thursday 's top speeds of 366mph -lrb- 590km/h -rrb- .
maglev trains hover and are propelled by electrically charged magnets .
central japan railway plans to have the train in service in 2027 .