A woman looks at photographs of dogs to choose a pet to rent at Puppy The World on January 24, 2009 in Tokyo, Japan. Rent-a-dog is becoming increasingly popular amongst people who love dogs but are unable to look after a pet full time due to limited living space or long working hours. Customers pay the dog-rental outlet around 2500 yen (32.5 USD) for an hour, and usually take their rented pet for a walk along the nearby beach. (Photo by Junko Kimura/Getty Images)

Dogs are kept at Puppy The World on January 24, 2009 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)

A woman meets the dog she is hiring to take for a walk at Puppy The World on January 24, 2009 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)

A woman walks the dog she has hired from Puppy The World along the beach on January 24, 2009 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)