Yes that is the existing test track which will be part of the Chuo Shinkansen planned to be ready between Tokyo and Nagoya somewhere in 2027. http://en.wikipedia.org/wiki/Chūō_Shinkansen
It is not the first maglev in operation though. The Chinese currently have the Shanghai Maglev. Check youtube for a cabride.
My thing is, and I have to hope something has been done to address this, but wouldn't a volcanic eruption dropping magnetic ash really gum this whole system up? And I sure wouldn't want to be on that thing when it gets hit with an earthquake or a Tsunami (Any of these three of which aren't exactly uncommon in Japan).