The Rubber Ball Factory is a building in Kuu Kuu Harajuku.


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.