It's not as fast as a speeding bullet, but it is the fastest thing on rails. Or rather, just above the rails.
Japan's so-called maglev train, which is levitated and propelled forward by magnetic force, is so fast it presses passengers back in their seats as it accelerates to 500kph in a little more than a minute.
Central Japan Railway Co, the company developing Japan's version of the train, is pushing for a commercial line between Tokyo and the western city of Osaka, a distance that is about the same as going from Washington to New York.
Theoretically, people would be able to travel between Tokyo and Osaka -- a nearly three-hour ride with current high-speed trains -- in an hour flat. That would make it the same time as an average commute in Tokyo and surrounding areas.
"It will be possible to finish work in Tokyo, catch a concert in Osaka and return home that evening," said Akio Seki, director general of Central Japan Railway's maglev system development division.
"Tokyo, Nagoya [in central Japan] and Osaka will become like one city."
Except for one problem: There is currently only one station and just 18.4km of test track.
There are no current plans for building a maglev line despite nearly four decades of research, 15 years of testing and more than US$2 billion invested, including government subsidies.
JR Central has said it is prepared to shoulder the operational costs, but it believes the government should pay the cost of building the infrastructure, which is estimated to be US$64 billion to US$77 billion, or upwards of US$128 million per kilometer.
That's a steep price to pay in a country that already has shinkansen bullet trains that connect major cities and can take passengers from Tokyo to Osaka in two-and-a-half hours. Travelers in a hurry can fly.
"The government will likely build shinkansen tracks in Kyushu and Hokkaido before they consider building a maglev track. Maglev service is a long way away," said Douglas Hayashi, an analyst with HSBC, referring to Japan's northern- and southern-most islands. "There's no guarantee it will become a reality."
The technology, first invented in the US in the mid-1960s, uses superconducting magnets to float the train about 10cm above the track, eliminating friction between the wheels and track. The train is propelled by a linear motor.
In test runs, the maglev train runs on wheels until it reaches 130kph, at which point it begins to glide smoothly. The train lurches a bit and is noisy inside because of air disturbance, but officials say they know how to fix both.
Last December, the maglev won the Guiness World Record for fastest train by going 581kph. It has beaten its own world record twice since it overtook France's TGV, the previous record-holder, in 1997.
Besides Japan, Germany and the US have tested maglev technology. China in January started the world's first commercial high-speed maglev service between Shanghai's international airport and its financial district.
Detractors of a Japanese maglev system say travelers won't shell out the estimated 15,000 to 20,000 yen (US$135 to US$180) for a one-way maglev ticket, especially when a shinkansen costs 14,000 yen and a plane ticket costs as little as 10,000 yen.
In Shanghai, ticket prices have already been slashed by a third because customers found prices to be too high.
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