The new Japanese maglev became the fastest train in the world.

The new Japanese maglev became the fastest train in the world after traveling at 374 miles per hour (603 kilometers per hour) on a test run near Mount Fuji last year, breaking its own world record of 366 miles per hour (590 km per hour), set the previous week.

Maglev trains -- already operating at slower speeds in Shanghai and Changsha, in China, and Incheon, in South Korea -- use magnetic repulsion both to levitate the train up from the ground, which reduces friction, and to propel it forward. It is perhaps Japan's boldest rail innovation yet.

The Chuo Shinkansen maglev line will link Tokyo to the southern city of Nagoya in 40 minutes -- arguably making the maglev faster than flying, given the time it takes to get through an airport. There are plans to later extend the line to Osaka.

The 16-carriage train will be able to shuttle 1,000 passengers along the 177 mile (286 km) track.

Tomoaki Seki, a manager at the Central Japan Railway Company, which is developing the maglev line, says the company has been testing the technology since 1997.

With a world record to its name, the maglev -- although not operational until 2027 -- heralds a new era in Japanese engineering.

The 2020 Olympics provide the perfect chance to highlight this achievement to the world.

It could have economic consequences, too. Japan is looking to sell the technology to the United States, Seki says.

"Japanese prime minister Shinzo Abe is a big fan of this project. He's proposing a route from Washington to New York, [at a speed] equivalent to Tokyo to Nagoya."

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Japan: Magnetic Levitation Passenger Train Broke The World Speed Record. Video.

A Japanese maglev that is the fastest passenger train in the world has broken its own speed record.

Operator JR Central said the train reached 603 kilometers per hour (375 miles per hour) in a test run on Tuesday, surpassing its previous record of 361 mph (581 kph) set in 2003. The train traveled for just over a mile (1.8 kilometers) at a speed exceeding 600 kph (373 mph).

Japan's high-speed rail services are among the most advanced in the world, with hundreds of trains running each day with minimal delays.

However, unlike regular shinkansen or "bullet trains" that run on steel rails, magnetic levitation trains hover above rails, suspended by powerful magnets.

The Maglev Test Line, near Mount Fuji about 80 kilometers (50 miles) west of Tokyo, is developing technology for use on a future 410-kilometer (250-mile) link that will reduce travel time between Tokyo and Osaka to just over an hour. The current minimum by bullet train is nearly three hours.

The maglev trains, begun as a project of Japan Airlines and the national railways with government support, have undergone decades of testing. Construction of the Tokyo-Osaka link, which is expected to cost more than 9 trillion yen ($76 billion), began in 2014.

The line, which will mostly run under mountains, is due to begin operations in the late 2020s. A similar system operates in Shanghai, linking its airport in the seaside suburbs of Pudong to the city's subway system.

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