A portion of Tokyo's central loop rail line is not in service on Saturday due to construction work for a new station.
East Japan Railway, which operates the Yamanote Line, says services between Osaki and Ueno stations are suspended from the first train run to around 4 p.m. This section includes Tokyo Station. The construction affects one-third of services on the line.
The new station, named Takanawa Gateway, is due to open in the spring of 2020 between Shinagawa and Tamachi.
Trains are also being suspended on Saturday on the Keihin-Tohoku Line between Shinagawa and Tamachi stations for the entire day.
About 1,700 railway workers have been deployed for Saturday's work. They are re-routing tracks for the new station, and will install electric cables and traffic lights along the new tracks.
JR East says this is the first suspension of the Yamanote Line for construction work since the company was established in 1987.