Signs like this one telling people not to leave their dog's feces all over the place are abundant in residential areas in Tokyo. There wouldn't be a need for these signs to be plastered everywhere if people weren't leaving poop behind when walking their dogs.
There's a back street near my home which I always take to go shopping for groceries as it leads to a wonderful shopping area not too far
There's a back street near my home which I always take to go shopping for groceries as it leads to a wonderful shopping area not too far