Japanese 'convenience' or 'trauma induction device'?

One forgets how jaded we've become. Look I'm not squeamish, like you I've seen a lot of weird stuff on the net, but this quick one minute clip actually made me shout WTF out loud. Thank you, Japan.

Don't worry, although set in a toilet, it's quite decent and suitable for work.

UPDATE: I have watched it again and have now said WTF aloud yet again. This time I must mention that the 'music' (ahem) verges on being the most bizarre collection of  sounds I have ever experienced.