NTT Docomo said Wednesday that its FOMA mobile phone services were disrupted from 8:30 a.m. until just after 1 p.m., affecting 2.52 million users.
Docomo said the glitch was worsened by the high traffic from passengers delayed due to a suspension of JR services on the Yamanote line in Tokyo.
The company said that the glitch stemmed from faulty packet switching equipment, disrupting services in 14 wards of Tokyo.
Meanwhile, JR East said that a train on the Yamanote line stopped between Shinjuku and Shin-Okubo stations after the driver saw smoke coming from the tracks at about 9 a.m., NHK reported. This in turn caused a suspension of services on the Chuo, Sobu and Saikyo lines while JR checked the source of the smoke. JR said it was not able to locate the source of the smoke.
JR East said about 120,000 passengers were affected. Trains started running again just after 10 a.m.© Japan Today