The Rubber Ball Factory is a building in Kuu Kuu Harajuku.
Background[]
The Rubber Ball Factory was first seen in Water Baby. Music, using the help of the Harajuku Zoo Acrobats, was able to climb up to the platform above the entrance/exit doors and use three giant rubber balls to round up the Howlie Hounds and bring them back to the Harajuku Zoo.
Not much else is known about the building.