Tokyo Metro Co., the capital's largest subway operator, said mobile phone services will be available in trains on all nine lines from noon Thursday.
While cellphone services in trains have improved over the past year, segments on the Ginza and Marunouchi lines have remained dodgy. These segments will be mobile friendly from Thursday, the carrier said.
However, users are still likely to lose connection along a short section between Kotakemukaihara and Senkawa stations on the Yurakucho and Fukutoshin lines due to construction that runs through fiscal 2016.