Shot in Jiyugaoka, Tokyo.
There is a small area which simulated the city of Venice. The water-channel-like pond was built between the buildings and a gondola was moored there. Of course, no watermen were around it and no once could ride it. It was just placed to create atmosphere.
And the building was reflected on the water surface. The surface was as calm as a millpond and looked like a mirror. The area was too narrow to feel as if I was in Venice.