One of the busiest train lines in central Tokyo was partially shut down Saturday for ongoing work to build a new station, affecting an estimated 560,000 people.East Japan Railway Co. suspended operation of roughly a third of the JR Yamanote Line, a 34.5-kilometer loop with a weekly ridership of over 28 million passengers, from the first train early Saturday through around 4 p.m.The Yamanote Line had never ceased operation for construction work since the operator was privatized in 1987.Related coverage:Section of Tokyo's Yamanote loop line to be shut on SaturdayREAD FULL ARTICLE