Buying the tech from Japan isn't gonna solve the fact that you don't even know how to manage a normal passenger rail line, buddy!
Also I know this is technically a Japanese news site reporting from their perspective, but the US is still seriously considering this on their end, just like how they've been considering it since Japan first introduced the SCMaglev prototype decades ago.
It takes 4 hours to take Amtrak between NYC and DC. The same amount of time as it takes to drive, which costs a fraction of the money. I would believe that someone made an economical flying car before I'd believe the US suddenly has a working maglev line between two major cities.