Do you know the word "water clock"?
Water clocks are one of the oldest time-measuring instruments like sun dials.
Or have you seen a water clock?
Though I haven't seen it, there is a modern water clock in Osaka.
Osaka is a very famous city as a noisy and cheerful city. Or you might have heard it, "in Osaka, every one spend all money on food."
Water clock, the combination with Osaka city, ridiculous
I also found this site in Japanese.
Handmade water clocks, enjoying with my granddaughter, brings a warm feeling