The water tower in the picture is often found in old apartment complexes. The water is raised to the top once, and the water pressure when it falls down supplies water to the complex. Many of the water towers in apartment complexes in Japan are of this shape.
When I was a child, I wondered what it was. I wondered.
God's house. Doesn't it look like a house of God? (^-^)
This is the "Otabisho" of Sumiyoshi Shrine. The "Otabisho" is a facility associated with Sumiyoshi Shrine. It is a place for the gods to rest or stay during their journey.