2nd post

Just took a photo when going to work.
I use Tobu Isesaki line, Tokyo Metro Hibiya line and JR Yamanote line for commuting.
The train on the photo is Tobu series 20050.  This is mainly used for local train as most of local train operates through to Tokyo Metro Hibiya line.

This train is operated with 8 cars.  However length of each car is 18 meters, which is a bit shorter than many of standard train with 20 meters length.  The label "5 Doors" means 4 out of 8 cars having 5 doors per side while others (normal configuration) only have 3 doors per side.  This is to speeding up boarding and unboarding during rush hour.