Kadoma City is located at the Northeast of Osaka Prefecture.
I don’t think there is anything touristy in the area except maybe if you want to see the headquarters of Panasonic :).
The symbol in the middle of the manhole is the City’s flag and the design surrounding it is Satsuki Azalea, the City’s flower.
It was an accident that I found this cover. If not for google maps taking me to Kadoma City on my way to Osaka, I would never have found this one.
This one I found near Kadomashi Station (Keihan Line). A colored version.