Tokyo's Yamanote Line fully resumed train services early Friday afternoon after a power outage stopped the vital part of the capital's transportation network from the day's first scheduled run, with the disruption affecting around 673,000 people, the operator JR East said.It said the power outage occurred around 3:50 a.m., likely due to an issue with an electrical facility serving a section between Shimbashi and Shinagawa stations in central Tokyo.While trains on the Keihin-Tohoku Line, which runs parallel to the Yamanote loop line on part of its route, were initially running, services were…READ FULL ARTICLE