You expect to find those "pose boards" - pictures with the face cut out for you to pose behind and others to take your photo - at amusement parks. Lately, I've been seeing them at a wide variety of places. One was at Kanda Myojin shrine, another next to Yodobashi Camera in Akihabara, one more in front of a sumo-themed restaurant in Ryogoku and this one at a maid cafe-themed souvenir shop in Akihabara.
This one was in a small train station in Noborito. Yes, you too can have your photo taken so it looks like you're in a train!
This is the new pose board that just started showing up at Yodobashi Camera in Akihabara. After pretending to ride the train, you can pretend to be a butler.