Zoos are always popular as a place that people want to go to during summer break. In fact, relative to its national territory, Japan has the most zoos in the world. Japanese people go to zoos for excursions, dates, and with family on days off. Perhaps because it doesn't have much land, zoos specializing in particular species such as monkeys, bears, and reptiles are increasing. In recent years, animals have been aging in zoos. We close in on vets who face problems that zoos have. Are Japanese zoos cool compared to the world?