Where and what is this??

[RossDensha]

 

Never seen anything like this. Hachiko line? Kawagoe line?

Looks like an add on set for an E231 1000 (the type used on the Tokaido honsen etc. services)

Edited December 14, 2019 by RossDensha

[railsquid]

This is an open day at Kouzu depot  and that's either an E231-1000 or an E233-3000 series (can't quite make out the number) which has been opened up as a rest space.

 

Video from presumably the same event:

 

 

[marknewton]

The car number is E231-1083.

 

Mark.

[RossDensha]

Ah cheers, so it's not some strange door cut, it's just an open day.