That's exactly what I think it is, a shiny black piece of thin card or plastic with a bit of a pattern around the edge and piece of grey track laid over the top. The structure is intended to be a representation of the roundhouse and turntable at the Kyoto Railway Museum which is hosting the event, with the visiting Thomas lurking in shed number 6, to which the grey straight is aligned.
Note that the male connector has been cut off the end of the grey straight, I'll bet there's a screw through the middle of the grey straight and into the baseboard so that it can be rotated by hand to line up with any of the sheds. There appear to be black JR steam locos in the other sheds, you can see the number plates on their smokebox doors in sheds 4, 5 & 7.
Suzukawa had a quick look at it and moved on very quickly, I thought. Are the tracks and scenery at displays like this normally held down with shiny dome-headed screws the way they are here?
Note that the male connector has been cut off the end of the grey straight, I'll bet there's a screw through the middle of the grey straight and into the baseboard so that it can be rotated by hand to line up with any of the sheds. There appear to be black JR steam locos in the other sheds, you can see the number plates on their smokebox doors in sheds 4, 5 & 7.
Suzukawa had a quick look at it and moved on very quickly, I thought. Are the tracks and scenery at displays like this normally held down with shiny dome-headed screws the way they are here?