Tokyo metro released install platform doors at 4 station on Yurakucho line on 27th Apr.
According to news release,at this time 4 station
between Chikatetu-Narimasu and Hikawadai equip platform doors.
The constraction planned 22th May to 10th Jul. and
will be in use from 21st Aug to 16th Oct(depending on stations).
At this time,new type doors which has glass are adopted,
so passengers see gap between train and platform
from outside of platform doors,and make visibility better.

After these 4 stations' platform doors in operation,
the number of station which equip platform doors on Tokyo metro will be 65(5 lines).