Pika-Chu-Choo!

It's actually a Pokémon-themed train, but our (Australian?) guide continually refers to it as a 'Pikachu train'.

The commentary is interesting, though, including comments on the 'usual' immaculately clean and graffiti-free nature of Japanese trains – which is something of which we in the west might like to take note.

Although this might well have been painted onto the vehicles, a 'wrap' applied to the surface is another technique that has been used in such exercises in the past, so I'm not going to say whether the commentary is correct on this point: it might be, or it might not...