Pachinko... Fiber Slot?

This is the proud entrance to a large pachinko parlor in downtown Kyoto. For those not familiar with it, pachinko is a surprisingly lo-tech japanese vertical pinball game, which seems to attract the same obsessive devotion as slot machines in Vegas - or Macau. There are a number of scatological jokes one could make about fiber helping 'pass' the pachinko balls through the slots etc, but that would be unseemly and crude...