Japanese bullet trains were back in service, including on the Shinkansen line seen here in 2014, after a decoupling incident that left them suspended for more than a week. File Photo by Frank ...

leading to a 3-hour suspension of bullet train services in eastern Japan and raising safety concerns as the incident was the second of its kind for the Tohoku Shinkansen Line in less than six months.

leading to a three-hour suspension of bullet train services in eastern Japan and raising safety concerns as the incident was the second of its kind for the Tohoku Shinkansen line in less than six ...