A strange sink?

When I was in Japan, I saw these two items in one of the airport toilets.

On the left is a place for parents to place their child so that the child cannot wander away. This, I get. What I didn’t understand was what was beside it.

There were other people around, so I couldn’t go and experiment with the appliance. Instead, I snapped a quick photo (hoping that people wouldn’t take much notice), so that I could do my research later.

Time has finally come for the research, and a Google Image search told me that the appliance was from a brand called TOTO. But most posts were in Japanese.

Clicking through some of them, I found that there is a blog for a toilet club, that seems to review toilets. :O And from this post, I found that the appliance was a TOTO L870.

I still couldn’t find any more information about it, but searching for the model name, I found this YouTube video.

So it looks like a special kind of sink…with a faucet from above that is sensor-activated, and a small squirter on the side that is push-operated.

I still don’t understand what this sink was doing beside the child seat. There were other “normal” sinks in the bathroom, and this was a standalone. It does look a little low, so maybe it is a child sink, but child sinks could be just a normal sink but lower (I can't remember whether the bathroom had those lower sinks). If you know what’s so special about this one, please let me know!