While the giant pandas at Tokyo's famous Ueno Zoo seem to be having a tough time breeding, there have been no such problems at an animal theme park in Wakayama Prefecture, where a number of panda cubs have been born in recent years.

The keys to success at Adventure World park in Shirahama are: an attentive yet laid-back approach by zookeepers who make full use of the natural environment to raise pandas, and the outstanding "innate character" of its male panda, experts said.

Adventure World has been involved in panda breeding since 1994 and is the Japanese branch of China's Chengdu Research Base of Giant Panda Breeding.