The test operation of LED departure information at stations on Toei Oedo Line between Hikarigaoka and Nishi-shinjuku-gochome started, whose official operation is starting on February 1st.
As hard as it is to believe, those stations doesn't have departure information on platforms. In addition, Bureau of Tokyo Metropolitan Transportation has introduce a new announcement since 2013, which is overhauled to all stations except 38 on Oedo Line on January, 2014. As a result, the old one used on those of Asakusa Line and Mita Line disappeared.
Putting the information display seems mean the introduction of the new announcement may be soon?
The aim of the introduction may be the realization to tell wait persons when the train comes easily and the change the new announcement to uniform two different type of the old ones.