Moose there's probably cloose to 100 of these webcams in Japan, I gave up on trying to discern exactly what they are, so I call them either parking lots or Security cam.
I'm guessing this is a park with all of the cherry trees in it but I wonder what kind of event that they have that they have tents set up, they've been up for a few days.
I've never heard of lighthouse being called a "Light" only. There's a second Light behind this one and I'm assuming this webcam is located on that Rear Light.